Speaker : Dr. Krishna Jayant, Columbia University, New York, NY
Date & Venue : 24-07-2017 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Dr. Jayant talked about the quantum-dot labeled quartz nanopipettes (15-30 nm inner diameters) which under two-photon visualization enables targeted intracellular recordings from spines, and also explained a new method termed "SPEER" (Sharp and Prism Enabled Electrophysiological Recordings), which enables high-throughput targeted intracellular electrophysiology in vivo using flexible nanopipettes. How the interdisciplinary approach of combining nanoelectronics, microfabrication, and state-of-the-art multi-photon microscopy can help decipher the biophysical substrate underlying single neuron computation and overall microcircuit function was also discussed.
Speaker : Dr. Amitha Shetty, JNCASR, Bangalore
Date & Venue : 11-07-2017 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The talk was based on the fabrication of a free-standing inorganic/organic hybrid structures of ZnO nanostructures with a conducting polymer,PEDOT:PSS, which performs as photodetectors. Dr. Shetty discussed about the synthetic technique which demonstrates how the thermodynamics of a material can be effectively used to obtain DMS (dilute magnetic semiconductors) quantum dots with varying transition metal ions which shows superior magnetic and optical properties.
Speaker : Dr. Veeresh Deshpande, IBM -Zurich Research Laboratory
Date & Venue : 06-07-2017 Nanoelectronics conference room. EE Annex Bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Advanced CMOS technology with 2D planar integration of devices is facing serious challenges in terms of area scaling due to lithographic limitations. 3D monolithic (3DM) integration has the potential to achieve very high circuit densities without device scaling, due to high granularity provided by transistor level stacking. The talk was focused on the III-V device integration and 3D CMOS circuits utilized as test-vehicles to demonstrate the 3D monolithic platform.
Speaker : Prof. Subramanian Iyer, FIEEE*, UCLA, USA
Date & Venue : 23-05-2017 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Silicon features have scaled by over 1500X for over six decades, and with the adoption of innovative materials delivered better power-performance, density and till recently, cost per function, almost every generation. This has spawned a vibrant system-on-chip (SoC) approach, where progressively more function has been integrated on a single die. Novel methods of system integration, heterogeneous integration the backbone of a new SoC methodology, and the concepts to flexible and biocompatible electronics with medical engineering applications were the topics discussed during this talk.
Speaker : Dr. Bin Zhao, FIEEE*, ON Semiconductor, USA
Date & Venue : 19-05-2017 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Many electronic products are essential in our daily life, which include not only the PCs with microprocessors and memory chips but also the wireless/mobile communication devices, portable multimedia devices, large-scale/high-definition displays, various entertainment systems, home appliances, healthcare wearable devices, smart sensing and IoT. Dr Zhao discussed the challenges in power management and the innovative solutions enabled by mixed-signal design and technologies for the advantages in performance, power efficiency, and cost during this talk.
Speaker : Prof. Cary Yang, FIEEE*, Santa Clara University, USA.
Date & Venue : 18-05-2017 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Continuous downward scaling in silicon integrated circuit technology into the sub-20 nm regime has created critical challenges in chip manufacturing, among them, reliability and performance of on-chip interconnects. The feasibility of fabricating a 3D CNT/graphene device, which can serve as the building block for all-carbon interconnects, was the topic of discussion. Enhanced understanding of the relationship between interfacial nanostructure and device resistance can lead to eventual functionalization of contacts between CNT vias and a graphene-based planar interconnect network in the most advanced technology nodes, were also discussed.
Speaker : Dr.Krishna Shenai,NMAM Institute of Technology, Nitte, Karnataka
Date & Venue : 17-03-2017 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Power Semiconductor Switch Module (PSSM), briefly termed as Power Module (PM), forms the heart of a modern electrical power system much like the microprocessor in a computing or communication system . The power system constitutes as the building block of 21st century energy economy much like the computing and communication systems were for the 20th century information economy. Imminent opportunities and challenges that exist in India in both silicon and wide bandgap (WBG) power electronics including Gallium Nitride (GaN) and Silicon Carbide (SiC) materials were the key topics discussed during this talk.
Speaker : Prof. Corinne Dejous, IMS Bordeaux
Date & Venue : 02-03-2017 EEG-302 Seminar room, Girish Gaitonde bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The talk focused on the Surface Acoustic Wave or SAW-based devices for highly sensitive and real-time chemical or biochemical sensing applications. This was followed by an overview showcasing the versatile effort made at IMS Bordeaux labs through a large spectrum of applications investigated, among them mainly environmental and health related ones. The materials are based on organic, inorganic, hybrid materials, either natural or engineered, typically with micro- to nano-structuration and surface modification for increased sensitivity and specificity.
Speaker : Prof. Masaki Mizuguchi, Tohoku University, Japan
Date & Venue : 21-02-2017 Nanoelectronics conference room. EE Annex Bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The correlation between spin and charge in electronic transports has been energetically studied in a scheme of spintronics research. Recently, the coupling between heat current, spin current and charge current is also attracting much attention, and this newly established field is called "spin caloritronics". During this talk Prof. Mizuguchi explained about the study on the correlation between magnetic anisotropy and the ANE in various materials. The enhancement effect of ANE with spin-wave spin currents in nanostructures was also discussed with theoretical viewpoints.
Speaker : Dr. Saurabh Chandorkar, Stanford University and Consultant, IIT Bombay
Date & Venue : 12-01-2017 EEG-302 Seminar room, Girish Gaitonde bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The talk was the about development of MEMS piezoeresistivecantilever based Volatile Organic Compound (VOC) sensor in IIT Bombay. This talk mainly focused on the activities in past 6 months and future directions for these kinds of sensors and also on the design optimization within the constraints of use of existing masks and future developments using topology optimization. Dr. Chandorkar also talked about the new research in understanding thermoelastic dissipation, temperature dependence of various energy loss mechanisms and topology optimization.
Speaker : Suman Datta, University of Notre Dame
Date & Venue : 10-01-2017 Nanoelectronics conference room. EE Annex Bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : In this talk experimental testbed comprising of compact coupled relaxation oscillator based dynamical system that exploits the insulator-metal transition in correlated oxide for example VO2), to efficiently solve the vertex coloring of arbitrary graphs, a prototypical combinatorial optimization problem was discussed. Dr. Datta also discussed that, the work is not only elucidates a physics-based computing method but also presents opportunities for building customized analog co-processors for solving computationally hard problems efficiently.
Speaker : Shrirang Abhyankar, Argonne National Laboratory, USA
Date & Venue : 09-01-2017 EEG-303, Seminar room, Girish Gaitonde bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Speaker discussed about the research groups efforts on accelerating dynamics (transient stability) simulation of very large-scale power grids .He also covered, basics on high-performance computing for power system analysis during this talk followed by presentation on an introduction to the open-source numerical library 'Portable Extensible toolkit for Scientific Computing (PETSc).
Speaker : John R. Reynolds, Georgia Institute of Technology, Atlanta, GA
Date & Venue : 04-01-2017 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Conjugated polymers provide a unique encompassing set of structurally tunable optical, electronic transport, and redox properties that allows their present and potential use in a host of applications which span, field effect transistors, light emitting diodes, electrochromism, solar cells, and photodetectors, along with batteries and supercapacitor. The talk focused on the synthesis and optimization of the morphology of solution processed π-conjugated oligomers and polymers, as they are applied in organic electronic devices.
Speaker : Prof. Sameer Sonkusale, Tufts University
Date & Venue : 20-12-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The talk was on recent progress in the area of optical sensor arrays for chemical sensing. Key opportunities for optoelectronic sensors and the need for intimate integration with CMOS-based instrumentation were also discussed. Prof. Sonkusale explained about the microfluidic optoelectronic sensor array for detection of dissolved volatile organic compounds in saliva as an early screening for stomach cancer and the design and implementation of high performance CMOS imagers that can measure both intensity and lifetime of chromophores with applications in lifetime-based chemical sensing.
Speaker : Dr. Pramey Upadhyay, UCLA
Date & Venue : 15-12-2016 Nanoelectronics conference room. EE Annex Bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : In the recent past, motivated by lowering dissipation in information processing devices, the quest for electrical control of magnetic order has resulted in a number of important fundamental discoveries, opening a field dubbed spintronics. The talk presented by Dr. Upadhayay focused on the spin-orbitronic control of various magnetic systems interfaced with heavy elements, which provide the required SOI. The talk also highlighted research done on the relativistic spin-orbit interaction (SOI) in magnetic system and was concluded by presenting first direct evidence of novel thermomagnonic torques via using single quantum spins in NV centers as a probe, which opens up possibilities for quantum spintronic applications.
Speaker : Prof. Sanjay Banerjee, University of Texas
Date & Venue : 14-12-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The talk was on the recent work in 2D materials - graphene, transition metal dichalcogenides, and topological insulators.
Speaker : Prof. Ajit Srivastava, Emory University
Date & Venue : 17-11-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Owing to unusually strong Coulomb interactions in truly 2D limit, optical spectra of monolayer TMDs is dominated by tightly bound excitons that are expected to strongly couple to light and form stable polaritons - half-light, half matter excitations. Prof. Srivastava talked about the recent results on valley Zeeman effect, where in analogy to spins, valleys shift in energy with magnetic field. The theoretical results on how the non-trivial geometry of Bloch bands modifies the excitonic fine structure of TMDs resulting in an orbital Zeeman effect in reciprocal space and a Lamb-like shift of levels were discussed.
Speaker : Dr. Revathy Padmanabhan, Technion-Israel Institute of Technology, Haifa, Israel
Date & Venue : 18-10-2016 Nanoelectronics conference room. EE Annex Bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : SOI-based optical devices allow for back-side illumination, and are compatible with standard CMOS processing. The dynamical properties were studied for many combinations of illumination intensities and voltage pulse amplitudes of varying durations, and different thickness of tunneling layer during this talk followed by demonstrations.
Speaker : Prof. Ajit Srivastava, Emory University
Date & Venue : 17-09-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : In this talk, recent results on valley Zeeman effect, where in analogy to spins, valleys shift in energy with magnetic field, and the observation of microcavity polaritons confirming the strong light-matter interactions in these materials were presented. Theoretical results on how the non-trivial geometry of Bloch bands modifies the excitonic fine structure of TMDs resulting in an orbital Zeeman effect in reciprocal space and a Lamb-like shift of levels was also discussed.
Speaker : Mr. Srujan, Ph.D student, Harvard University
Date & Venue : 26-08-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : In the past few decades, quantum optics - the science of interaction between light and matter - has grown tremendously due to our ability to control individual atoms and atom-like systems. In this talk, I will give a general overview of our research on one such system - 'diamond color-centers', which are luminescent point-defects in diamond that function as artificial atoms. will describe our recent experiments on this theme, and discuss two potential applications of such color-center devices - quantum communication, and magnetic-field sensing with nano-scale resolution.
Speaker : Prof. Shivaram Kalyanakrishnan, CSE IITB
Date & Venue : 24-08-2016 EEG-303 Seminar room, Girish Gaitonde bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Reinforcement Learning (RL) is a general paradigm under which an agent, by trial and error, can discover actions that result in long-term gain. Integrating ideas from various disciplines, RL has matured as a field of study in the last few decades. Prof. Kalyanakrishnan shared overview of RL and its key algorithmic elements also outlined the role of representations in determining the success of RL during this talk.
Speaker : Dr. Sujay Desai, UC Berkeley
Date & Venue : 18-08-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Transition metal dichalcogenides (TMDs) like MoS2 and WSe2 are a class of layered materials with applications for electronic and optoelectronic devices. The strain engineering of TMDs using the example of multilayer WSe2, which undergoes an indirect to direct bandgap transition on the application of uniaxial tensile strain, and the large area exfoliation of monolayer TMDs using a gold-mediated exfoliation of technique were the discussed topics of this talk.
Speaker : Prof. Ross Bassett, North Carolina State University
Date & Venue : 09-03-2016 Room no. 22, 2nd floor, VMCC, IIT Bombay- 400076.
About the workshop : This talk was on 'The Technological Indian,' a book based on a database of every Indian to graduate from MIT from its founding in 1861 to 2000. The book argues that Indians looked to MIT to an extraordinary extent in their quest for technological development. While MIT's role in providing the model for the IITs is well known (and should be especially so in an institution that has its own "Infinite Corridor") this talk focused on three surprises that came to light in researching this book.
Speaker : Durga Misra, New Jersey Institute of Technology, Newark, NJ, USA
Date & Venue : 04-03-2016 Nanoelectronics conference room. EE Annex Bldg., 3rd floor, EE Dept., IIT Bombay- 400076.
About the workshop : This talk focused on some of the recent developments of EOT scaling of high-k gate dielectrics on silicon and germanium and how it impacts the interface; and the challenges of obtaining an acceptable interface for high-k on high mobility substrates.
Speaker : Dr. Debanjan Bhowmik, University of California , Berkeley
Date & Venue : 11-02-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Spin orbit torque has recently emerged as an alternative mechanism for manipulating ferromagnets, which offers advantages of lower energy consumption, simpler device structure, etc. Traditionally ferromagnetic domain wall is known to flow along or opposite to the direction of the current, but Dr. Bhowmik discussed that spin orbit torque, owing to its unique symmetry, can be used to move the domain wall orthogonal to the current direction.
Speaker : Prof. Srinivas Tadigadapa, PSU, USA (IEEE AE/PD Talk)
Date & Venue : 28-01-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The extraordinary stability of quartz resonators and accuracy of around 30 ms per year has made quartz the most ubiquitous time sensor. The talk demonstrated the applications of micromachined bulk acoustic wave resonators for gas identification through viscoelastic analysis of the chemosensitive layer upon absorption of gases, thermal infrared sensors and their applications for biochemical sensing and magnetostrictively coupled perturbations in the propagation of bulk acoustic waves for magnetic sensing. Micromachining quartz offers various new configurations and advantages for gravimetric, thermal, viscoelastic, and magnetic sensing.
Speaker : Prof. Subodh G. Mhaisalkar, NTU
Date & Venue : 28-01-2016 , Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The past five years have witnessed an unprecedented advance in the field of solar cells with perovskite metal halide, CH3NH3PbI3, as the primary semiconductor of interest. The talk addressed the broad palette of elemental substitutions, solid solutions, and multidimensional families that will provide the next step towards the advances of the perovskite solar cells and light-emitting devices. Further Dr. Mhaisalkar discussed about the challenges and opportunities in perovskite materials beyond methyl ammonium lead iodide with particular emphasis on their optoelectronic properties.
Speaker : Dr. Dirch Hjorth Petersen, Technical University of Denmark
Date & Venue : 15-01-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Magnetic random access memory (MRAM) is a versatile nonvolatile memory capable of replacing SRAM, DRAM and Flash memory. For example MRAM has been introduced as a low-power cache memory for high performance CPUs. Monitoring the electromagnetic performance of this stack is important as fabrication yield is highly dependent on adverse effects like pinholes. Dr. Petersen discussed about recent innovations in the CIPT method, including advanced data analysis to boost precision on blanket films, adaptation to small test pads and vibration tolerant microelectrodes.
Speaker : Prof. Yong Chen, Purdue University
Date & Venue : 06-01-2016 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Topological insulators (TI) have recently attracted a lot of interests in both solid state physics and nanoelectronics community. These materials are semiconductors (band insulators) in the bulk (with "negative bandgap"), but have "topologically protected" conducting surfaces with spin-polarized, graphene-like Dirac electrons, promising a large number of exotic electronic and optical properties. The talk focuses on the prospects of using TIs as an electrically controlled source of spin polarization for all electric spin injection, as well as "spin battery", "spin capacitor" and "spin memory" in spintronic and quantum information device applications.
Speaker : Prof. Ajit Srivastava, Emory University
Date & Venue : 17-11-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Owing to unusually strong Coulomb interactions in truly 2D limit, optical spectra of monolayer TMDs is dominated by tightly bound excitons that are expected to strongly couple to light and form stable polaritons - half-light, half matter excitations. Prof. Srivastava talked about the recent results on valley Zeeman effect, where in analogy to spins, valleys shift in energy with magnetic field. The theoretical results on how the non-trivial geometry of Bloch bands modifies the excitonic fine structure of TMDs resulting in an orbital Zeeman effect in reciprocal space and a Lamb-like shift of levels were discussed.
Speaker : Prof. Nagendra Krishnapura, IIT Madras.
Date & Venue : 27-07-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Nonlinear distortion and noise are ever-present impairments in electronic circuits.Knowing individual contributions of these disturbances from different elements to the overall output is useful for optimizing circuits. In this talk Prof. Krishnapura showed how distortion contributions from individual elements can be calculated in a standard circuit simulator without oversimplifying the circuit or getting into details of the nonlinear device models.
Speaker : Prof. Kunal Ghosh, IIT Mandi.
Date & Venue : 08-06-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Photovoltaic technology prevalently relies on p-n junction for device fabrication.However, p-n junction solar cells are neither thermodynamically nor practically optimum. The talk introduced a device structure termed "Carrier Selective Contact "(CSC) device to the audience. CSC devices allow selective extraction of carriers by utilizing inversion and accumulation of surfaces, thereby circumventing the necessity of p-n junction.. In this talk, amongst the CSC technologies, the focus was also on silicon heterostructure. Additionally, the talk covered initial results on the open-circuit voltage of non-metallized flexible solar cells utilizing silicon heterostructure technology.
Speaker : Dr. Kasturi Saha, Post doc., Massachusetts Institute of Technology.
Date & Venue : 25-05-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Tremendous research activity worldwide has focused on attempting to harness the exotic properties of quantum physics for new applications in metrology, computation, and communications - a push to develop "engineered quantum systems". Underlying any such capability is the need to exert control over a chosen quantum system in order to coax it into performing useful tasks. Dr. Saha presented the recent progress toward engineering high resolution sensors using Nitrogen-Vacancy (NV) centers in diamond and show that it may provide a platform for ultra-sensitive rotation sensing (gyroscope) immune to external vibrations, which can be applied for nanoscale aviation systems and navigational and tactile applications.
Speaker : Dr. Susthitha Menon, University Kebangsaan Malaysia (UKM).
Date & Venue : 25-05-2015 Nano-electronics conference room, IITBNF, EE Dept. Annexe bldg. IIT Bombay, Mumbai, Powai- 400076
About the workshop : Dr Susthitha Menon from the University Kebangsaan Malaysia (UKM, The National University of Malaysia) is an active member of IEEE Malaysia Chapter and holds a Ph.D. from UKM Malaysia and currently an Associate Professor and Research Fellow (Optoelectronics and Nanophotonics) in the Institute of Micro engineering and Nano electronics (IMEN). She is also the Regional Editor, IEEE EDS, Newsletter for Region 10 (Australia and South East Asia) and Secretary, IEEE Electron Devices Society, Malaysia Chapter. She interacted with interested faculty and students and also discussed the Research Activities at the Institute of Micro engineering and Nano electronics (IMEN), UKM (National university of Malaysia).
Speaker : Dr. Susthitha Menon, University Kebangsaan Malaysia (UKM).
Date & Venue : 25-05-2015 Nano-electronics conference room, IITBNF, EE Dept. Annexe bldg. IIT Bombay, Mumbai, Powai- 400076
About the workshop : Dr Susthitha Menon from the University Kebangsaan Malaysia (UKM, The National University of Malaysia) is an active member of IEEE Malaysia Chapter and holds a Ph.D. from UKM Malaysia and currently an Associate Professor and Research Fellow (Optoelectronics and Nanophotonics) in the Institute of Micro engineering and Nano electronics (IMEN). She is also the Regional Editor, IEEE EDS, Newsletter for Region 10 (Australia and South East Asia) and Secretary, IEEE Electron Devices Society, Malaysia Chapter. She interacted with interested faculty and students and also discussed the Research Activities at the Institute of Micro engineering and Nano electronics (IMEN), UKM (National university of Malaysia).
Speaker : Dr. Vibhor Singh, Kavli Institute of Nanoscience, Delft University of Technology, Netherlands.
Date & Venue : 13-05-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Cavity optomechanics, which utilizes the interaction between light and mechanical motion has been extremely successful in detecting and controlling the mechanical motion with high sensitivities. To improve the coupling between light and mechanical motion, several implementation have been adapted both in microwave and in optical domain of light. Dr. Singh discussed about the combination of low mass density, high frequency and high quality factor of mechanical resonators made of two-dimensional crystals such as grapheme which makes them attractive for applications in force/mass sensing and exploring the quantum regime of mechanical motion. In a new implementation of an optomechanical setup based on a SiN membrane resonator and a 3-dimensional superconducting microwave cavity, a cooperativity C of 146,000 is achieved.
Speaker : Prof.Pradeep Dixit, Department of Mechanical Engineering, IIT Bombay.
Date & Venue : 16-04-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Since the last decade, there is a continuous demand of fabricating miniaturized hand-held consumer electronic devices having faster signal speed, better electrical performance and compact packaged size. These are the main factors pushing for the need of developing 3D interconnection and packaging solutions application for microsystems.Through-silicon Vias (TSV) is one of the 3D interconnect technology being used in several consumer products. In this seminar, basic details of TSV and related fabrication processes were discussed and the focus area was the electroplated copper filled TSVs for via-last applications.
Speaker : Prof. Shankar Balachandran, Visiting Professor, Electrical Engineering, IIT Bombay.
Date & Venue : 15-04-2015 Seminar Hall 21, VMCC, IIT Bombay- 400076.
About the workshop : Singular value decomposition (SVD) is a popular matrix decomposition technique and is pervasively used in diverse areas such as document retrieval, background subtraction in videos, and compression. Real world applications see addition or removal of rows or columns, and recomputing of SVD from scratch is computationally prohibitive in most applications.In this talk, two flavors of the incremental version of computing SVD was shown: downdating and updating the SVD.Techniques that allows deferring subspace calculations if the applications do not require the SVD to be explicitly retrieved upon each downdate or update request was also shown during the talk.
Speaker : Dr. Roopali Kukreja, University of California, San Diego.
Date & Venue : 09-04-2015 Nano-electronics conference room, IITBNF, EE Dept. Annexe bldg., IIT Bombay 400076.
About the workshop : The study of spin dependent transport in ferromagnetic materials has gained interest in the past two decades, leading to various technological advancement such as the introduction of Giant Magnetoresistance (GMR) sensors which revolutionized the read head technology of hard disk drives, the appearance of magnetic field driven Magnetic Random Access Memory and very recently the commercialization of Spin Transfer Torque RAM. In this talk Dr. Kukreja discussed on their recent measurements on transport of spins from a Co ferromagnet into non-magnetic Cu metal when a current traverses across the two materials.
Speaker : Dr. G S Lodha, Outstanding Scientist and Head, Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore.
Date & Venue : 24-03-2015 Venue: Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : X-ray LIGA is an ideal tool for fabricating ultra-high aspect ratio micro structures.The technique has been used for fabricating optics (x-ray,visible and infrared), sensors and actuators, fluidics and photonics. A beamline for x-ray lithography is operational on Indus-2. The beamline offers wide lithographic window in the x-ray energy range 1-40keV and wide x-ray beam for producing microstructures in polymers of upto ~100mm. High aspect ratio structures fabricated for various applications including x-ray optics, mechanical engineering, sensors/actuators and material science was presented during the talk. The talk also highlighted the results on the development of high aspect ratio comb drives, amplification mechanism, rectangular cavity resonator are produced in P.M.MA.
Speaker : Prof. Kenji Uchino, Int'l Ctr. for Actuators & Transducers, The Penn State University.
Date & Venue : 12-03-2015 Venue: Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Actuator applications of piezoelectrics started in late 1970s and enormous investment was in-stalled on practical developments during 80s, aiming at consumer applications such as precision positioners with high strain materials, multilayer device designing and mass-fabrication processes for portable electronic devices, ultrasonic motors for micro-robotics and smart structures. The 21st century faces to a "sustainable society". The five key trends were discussed in this paper for providing the future perspectives; "Performance to Reliability", "Hard to Soft", "Macro to Nano", "Homo to Hetero" and "Single to Multi-functional".
Speaker : Dr. Kasturi Saha, Post doc., Massachusetts Institute of Technology.
Date & Venue : 10-03-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : The tool box of integrated nanophotonics today is rich: from the ability to guide and amplify multiple wavelength sources at GHz bandwidths, to optomechanical MEMS and optical interconnects. Research in the area of nanophotonics has provided new understanding that impacts their use across disciplines, from quantum computing to microscopy, sensing and biological applications. In this the recent advances in nanotechnologies that have enabled fabrication of nanoscale optical devices in silicon nitride that can be exploited for frequency metrology was outlined.
Speaker : Prakash Tiwari, Ph.D., Assistant Professor, Electrical Engineering, Indian Institute of Technology Jodhpur.
Date & Venue : 04-03-2015 Girish Gaitonde seminar room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay-400076.
About the workshop : Organic field-effect transistors/thin-film transistors (FETs/TFTs) receive significant attention because of their potential use in flexible electronics. The operating voltage, operational stability, contact resistance, and process simplicity are some of the crucial aspects, which are taken into account for designing high performance FETs were discussed during this talk. By choosing a suitable materials and interfaces, and sometimes by introducing some thin buffer layers to reduce charge trapping, high performance can be achieved in devices.
Speaker : Rohit Srivastava, Associate Professor, Department of Biosciences and Bioengineering,, IIT Bombay.
Date & Venue : 27-02-2015 LH 101, Lecture Hall Complex, IIT Bombay - 400076.
About the workshop : There is an increasing demand for accurate, efficient and cost-effective treatment methods and devices in critical care units. The main goal behind the research in Nanobios Lab at IIT Bombay relates to the development of biosensor assays and their integration into affordable Point-of-care diagnostic devices. Nanobios lab in collaboration with Biosense Technologies Pvt Ltd have already commercialized, uChek (http://uchek.in) - a low cost smartphone based urine dipstick reader which was designed, tested and deployed. This talk discussed about uChek that it can interpret upto ten analytes in urine including glucose, bilirubin , ketones, proteins, urobilinogen, pH, SG, occult blood, leukocytes and nitrites and also that the accuracy of uChek was found to be comparable to commercially available semi-automated urinalysis instruments in laboratories with 100% of readings within +/- 1 color block. The reader and strips are currently under clinical trials at various hospitals in India.
Speaker : Dr. Subodh G. Mhaisalkar, Tan Chin Tuan Professor, School of Materials Science & Engineering & Executive-Director, Energy Research Institute @ NTU (ERI@N) Nanyang Technological University.
Date & Venue : 19-02-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Perovskite metal halides, represented by CH3NH3PbI3, have yielded unprecedented advances in photovoltaics with power conversion efficiencies close to 20%, rivaling the performance of industry standard silicon. The excellent electronic properties, especially the balanced electron and hole diffusion lengths, has positioned this material at the forefront of solution processed photovoltaics, as well as an excellent candidate for light emission and lasing applications. This presentation addressed the various challenges and opportunities in perovskite solar cells beyond methyl ammonium lead iodide with particular emphasis on their optoelectronic properties.
Speaker : Ulf Schlichtmann, Technische Universität München (TUM).
Date & Venue : 10-02-2015 Girish Gaitonde Bldg., Conference Room, Electrical Dept.
About the workshop : Integrated Circuits (ICs) and Systems are the basic Bldg. blocks of the electronics industry. With rapid advancement, companies are constantly looking to design smaller and faster chips. What can we next expect from this industry? Reliability and robustness are emerging recently as key challenges in IC design.Traditionally, Integrated Circuits and Systems (ICs) were designed to minimize area and thus cost. Performance also was a key issue from very early on. This talk gave an overview about the current situation of IC and Embedded System Design and also addressed reliability and robustness challenges and report especially on research activities and results on Electronic Design Automation (EDA) techniques at TUM which address these challenges. .A brief overview of educational activities of TUM in Munich and Singapore was also shared.
Speaker : Naga Phani Aetukuri, IBM Almaden Research Center, San Jose, CA.
Date & Venue : 30-01-2015 Nano-electronics conference room, IITBNF, EE Dept. Annexe bldg.IIT Bombay, Mumbai, Powai- 400076.
About the workshop : Metal oxides are a remarkable class of compounds that exhibit almost every known condensed matter phenomenon such as ferroelectricity, ferromagnetism, anti-ferromagnetism, high-Tc superconductivity and metal-insulator transitions. In this talk, Mr. Aetukuri showed his work on two distinct oxide systems – Li2O2 and VO2 –with applications in energy storage and low power electronic devices, respectively. There work on formation and morphological evolution of Li2O2 in the context of Li-O2 batteries, where Li2O2 is the battery’s discharge product and VO2-based heterostructures and devices was discussed along with VO2, an archetypal correlated electron system that exhibits a near room temperature metal-insulator transition (MIT) with a concomitant structural phase transition.
Speaker : Prof. Anthony K. Cheetham , FRS, Goldsmiths' Professor of Materials Science,Department of Materials Science and Metallurgy, University of Cambridge, UK.
Date & Venue : 19-01-2015 F.C. Kohli Auditorium, Department of Computer Science & Engineering, (KReSIT Bldg.), IIT Bombay- 400076.
About the workshop : Much of our current research on metal-organic frameworks (MOFs) focuses on their physical properties, including their mechanical, optical, magnetic, ferroelectric and electronic behavior. One of the characteristic features of MOF systems is that they undergo a wide range of phase transitions. These include classical transitions associated with the onset of magnetic ordering, ferroelectric ordering, high-spin low-spin transitions, and so on. Prof. Cheetham in his lecture discussed about the several cases of phase transitions that depend heavily on framework flexibility. He further discussed about a dense oxalate that exhibits transition from an insulating to a proton conducting phase in response to a change in humidity, and explore chemical transformations that depend on flexibility, such as the topotactic dehydration of a dense MOF, lithium L-malate, to form lithium fumarate, and the topochemical dehalogenation of a copper trithiocyanurate framework that is accompanied by a change from an insulating crystalline phase to an amorphous semiconductor.
Speaker : Dirch Hjorth Petersen, Technical University of Denmark.
Date & Venue : 15-01-2015 Nano-electronics conference room, IITBNF, EE Dept. Annexe bldg. IIT Bombay, Mumbai, Powai- 400076.
About the workshop : This talk described about the innovations and theory behind a powerful suite of MEMS technologies used worldwide for electrical characterization of electronic materials. How could micro four-point probes become the industry standard for electrical measurements on ultrathin semiconductors used in CMOS fabrication? How can you do Hall effect measurements more accurately than with a standard Hall bar? And what do we learn about the electrical properties of graphene when we compare THz spectroscopy to micro four-point probes – 1D transport in a 2D conductor? All these questions were discussed.
Speaker : Prof. Hiroshi Iwai, Tokyo Institute of Technology, Yokohama, Japan.
Date & Venue : 14-01-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : Although Si MOSFETs have dominated the integrated circuit applications over the past four decades, it is anticipated that the development of CMOS would reach MOSFET downsizing limits sometime after the next decade. However, there are no promising candidates which can replace CMOS with better performance for high-density integration with low cost for the moment. Thus, maybe, we have to stick to the CMOS devices until its end. In order to pursue the downsizing of CMOS for another decade, the develop.m.ent of new technologies is becoming extremely important. Not all the companies can necessarily develop the most advanced technology timely and the competition between the leading semiconductor manufacturing companies becomes very severe for their survival. In this tutorial session, past, now, and future of logic MOS LSI technologies were explained.
Speaker : Sushil Kumar Pandey, PhD student, Electrical Engineering at IIT Indore, India
Date & Venue : 05-01-2015 Girish Gaitonde conference room, Girish Gaitonde bldg., 2nd floor, EE Dept., IIT Bombay- 400076.
About the workshop : In this presentation, he discussed the optimized results of the growth conditions of thin films of undoped ZnO, p-type Sb-doped ZnO and n-type Ga-doped ZnO materials grown by dual ion beam sputtering deposition system (DIBSD). Optimization of growth conditions in terms of optical, elemental, electrical, crystalline and morphological properties of these films was been performed. Photoluminescence (PL) spectroscopy, X-ray photoelectron spectroscopy (XPS), Hall measurements, X-ray diffraction (XRD), and Atomic force microscope (AFM) measurements were carried out to determine and correlateamongst optical, elemental, electrical, crystalline and morphological properties of these films, respectively.
