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TZID:Asia/Kolkata
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DTSTART:20250101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Kolkata:20260701T160000
DTEND;TZID=Asia/Kolkata:20260701T170000
DTSTAMP:20260529T084557Z
CREATED:20260529T084419Z
LAST-MODIFIED:20260529T084557Z
UID:10527-1782921600-1782925200@www.cense.iisc.ac.in
SUMMARY:[Seminar] : Lithium Niobate on Insulator Wideband Surface Acoustic Wave Devices
DESCRIPTION:Speaker: Prof. Ming-Huang Li\, Associate Professor\, Department of Power Mechanical Engineering\, \n         National Tsing Hua University\, Hsinchu\, Taiwan.\n\nTitle: "Lithium Niobate on Insulator Wideband Surface Acoustic Wave Devices"\nDate: Wednesday\, 01st July 2026 - Time: 4 PM\n\nVenue: CeNSE Seminar Hall\n\nAbstract:\n\nNext-generation wireless communication systems require large-volume\, high-speed data delivery\, \ndriving the need for wideband RF signal-processing functions. This has accelerated the development \nof wideband micro acoustic devices using emerging piezoelectric materials. Among them\, surface \nacoustic wave (SAW) devices based on thin-film lithium niobate on insulator (LNOI) are highly \npromising\, offering strong electromechanical coupling\, frequency scalability\, mechanical \nrobustness\, excellent power handling\, and relatively simple fabrication. This talk presents \nan overview of recent advancements in high-performance and wideband SAW resonators\, filters\, \nand acoustic delay lines (ADLs) based on LNOI technology\, and further explores their potential \napplications in the C-band and X-band.\n\nBiography:\n\nMing-Huang Li received his Ph.D. degree from the Institute of NanoEngineering and MicroSystems at \nNational Tsing Hua University\, Hsinchu\, Taiwan\, in 2015. He is currently an Associate Professor at \nthe Department of Power Mechanical Engineering\, National Tsing Hua University\, Hsinchu\, Taiwan.\n\nHis research interests include micromechanical resonators and oscillators\, surface/bulk acoustic wave \ndevices\, multi-physics hybrid microsystems\, monolithic CMOS-MEMS technology\, and interface circuit \ndesign for MEMS-integrated microsystems.\n\nHe received the TRANSDUCERS Early Career Award in 2021. He serves as an Associate Editor of \nIEEE Transactions on Ultrasonics\, an Editor of IEEE Electron Device Letters\, and a Junior Editorial \nBoard member of Journal of Micromechanics and Microengineering.\n\n\n\nHost Faculty:  Prof. Gayathri Pillai
URL:https://www.cense.iisc.ac.in/event/seminar-lithium-niobate-on-insulator-wideband-surface-acoustic-wave-devices/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Kolkata:20260703T160000
DTEND;TZID=Asia/Kolkata:20260703T170000
DTSTAMP:20260622T045044Z
CREATED:20260622T044850Z
LAST-MODIFIED:20260622T045044Z
UID:10589-1783094400-1783098000@www.cense.iisc.ac.in
SUMMARY:[Seminar] : 2D Materials for Next-Generation Microelectronics: From CMOS Devices To  Monolithic 3D Integrated Systems
DESCRIPTION:Speaker: Mr Subir Ghosh\, Research Assistant\, Dept. of Engineering Science and Mechanics\, \n         The Pennsylvania State University.\n\nTitle: "2D Materials for Next-Generation Microelectronics: From CMOS Devices To Monolithic 3D \n        Integrated Systems"\n\nDate: Friday\, 3rd July 2026 - Time: 4 PM\n\nHi-Tea & Coffee: 5 PM\n\nVenue: CeNSE Seminar Hall\n\nAbstract:\n\nIn this talk\, I will provide an overview of my research efforts aimed at advancing two-dimensional \n(2D) electronics from fundamental device innovation to fully integrated computing and sensing systems. \nI will discuss the development of wafer-scale\, high-performance p-type WSe2 transistors enabled by \ncontrolled nitric-oxide doping\, which addresses a long-standing limitation in achieving \ncomplementary 2D CMOS logic. I will then highlight our demonstration of a complementary 2D \none-instruction-set computer constructed from large-area MoS2 and WSe2 devices\, illustrating how \n2D materials can support scalable and energy-efficient computation. The talk will also explore \nmonolithic three-dimensional integration platforms that bring together graphene chemisensors\, \nMoS2 memtransistors\, and dense interlayer vias within nanoscale vertical proximity. Finally\, \nI will describe a self-powered 3D integrated circuit that combines 2D CMOS logic\, graphene \nsensing modules\, and silicon photovoltaics to enable autonomous\, near-sensor intelligence.\n\n\nBiography:\nSubir earned his bachelor’s degree in Electronics and Communication Engineering from the \nHeritage Institute of Technology\, Kolkata\, in 2018\, and his master’s degree in Electron \nDevices from Jadavpur University in 2021\, where he worked on atomistic simulations of 2D materials. \nHe then served as a VLSI Engineer at DxCorr Design Technology before beginning his Ph.D. at Penn \nState University in 2022. His research focuses on high-performance 2D transistors\, large-scale \n2D integrated circuits\, and monolithic 3D integration that unifies sensing\, computation\, and \nenergy harvesting\, along with interests in neuromorphic and strain engineered 2D systems. \nHe has also won best paper awards in DRC 2025 and ICEE 2025.\n\nHost Faculty:  Prof. Sushobhan Avasthi
URL:https://www.cense.iisc.ac.in/event/seminar-2d-materials-for-next-generation-microelectronics-from-cmos-devices-to-monolithic-3d-integrated-systems/
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BEGIN:VEVENT
DTSTART;TZID=Asia/Kolkata:20260708T160000
DTEND;TZID=Asia/Kolkata:20260708T170000
DTSTAMP:20260622T050154Z
CREATED:20260622T045815Z
LAST-MODIFIED:20260622T050154Z
UID:10595-1783526400-1783530000@www.cense.iisc.ac.in
SUMMARY:[Seminar] : Creating a second order nonlinearity by breaking symmetry: The hunt for (2) in silicon photonics
DESCRIPTION:Speaker: Prof. Joerg Schilling\, Professor\, Martin-Luther-University Halle-Wittenberg\, Germany.\n\nTitle: "Creating a second-order nonlinearity by breaking symmetry: The hunt for (2) in \n        silicon photonics"\n\nDate: Wednesday\, 8th July 2026 - Time: 4 PM\n\nHi-Tea & Coffee: 5 PM\nVenue: CeNSE Seminar Hall\n\nAbstract:\n\nSecond-order nonlinear processes like sum- and difference frequency generation form the heart \nof efficient all-optical frequency transformation in optics and photonics. They are used to \nbuild optical parametric amplifiers and oscillators as well as create entangled photon pairs \nvia spontaneous downconversion for optical quantum computing and quantum communications. \nIn all of these processes\, the second-order susceptibility c(2) represents the crucial parameter. \nUnfortunately\, the large class of centrosymmetric and amorphous materials\, including Si\, SiO2 \nand Si3N4 lack a dipolar c(2)\, so that efficient c(2)-related nonlinear processes seemed to \nbe impossible in integrated silicon photonics.\n\nIn this talk\, firstly\, an overview of attempts to introduce a c(2)in silicon by breaking the symmetry \nof its crystal lattice by applying inhomogeneous mechanical stress is given. These studies ultimately \nled to the investigation of electric field-induced second-order nonlinearity in silicon and \nsilicon-based amorphous materials like silicon-rich nitride (SiNx) and silicon-rich oxide (SiOx). \nInvestigating electric-field-induced second harmonic generation (EFISH) in these materials showed \nthat an effective or quasi-c(2) as a product of the natural c(3) and the applied dc-field can be induced. \nValues of c(2)quasi » 60pm/V exceeding the c(2) of classic nonlinear crystals like LiNbO3 could be demonstrated. \nBy tuning the silicon content in these films to optimise the material c(3) and the breakdown field\, \neven values on the order of c(2)quasi =100pm/V are predicted. Since the material can be structured \nusing classic CMOS processes\, the design of optical resonators or quasi-bound states in the continuum \n(quasi-BIC)  is possible\, thus leading to a further increase in the efficiency of the nonlinear processes \nby strong confinement of the light. Overall\, the electric-field-induced generation of an effective c(2) \nallows for the creation and control of the second-order nonlinearity by design\, offering a large \nflexibility for active nonlinear processes in integrated Si photonics in the future.\n\nBiography:\nJoerg Schilling studied physics at the Martin-Luther-University (MLU) Halle-Wittenberg (Germany). \nSubsequently\, he was awarded a PhD in Physics for his research at the Max-Planck-Institute of Microstructure \nPhysics on 2D- and 3D photonic crystals based on macroporous silicon in 2002 under the supervision of \nProf. Ulrich Goesele. After a 3 year Postdoc at California Institute of Technology in the group of \nProf. Axel Scherrer\, he was awarded a Royal Society University Research Fellowship and moved to Queen’s \nUniversity Belfast\, undertaking research in hyperbolic metamaterials. In 2009\, he became a Junior Research \nGroup leader at the Centre for Innovation Competence SiLi-nano at the MLU in Halle (Germany) and subsequently \nobtained a  Full Professorship in 2017\, doing research in the area of active silicon and hybrid photonics. \nHis recent research focuses on emission enhancement of Ge-quantum dots and Si-nanocrystals using Mie \nresonances and the use of electric field-induced second-order nonlinearity for frequency \ntransformation processes.\n\nHost Faculty:  Prof. Pavan Nukala
URL:https://www.cense.iisc.ac.in/event/seminar-creating-a-second-order-nonlinearity-by-breaking-symmetry-the-hunt-for-%ef%81%a32-in-silicon-photonics/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Asia/Kolkata:20260723T160000
DTEND;TZID=Asia/Kolkata:20260723T170000
DTSTAMP:20260717T051216Z
CREATED:20260717T051041Z
LAST-MODIFIED:20260717T051216Z
UID:10686-1784822400-1784826000@www.cense.iisc.ac.in
SUMMARY:[Thesis Colloquium] : Design and Development of Hybrid Capillary-Wicking and Micro-Delivery Architectures for Cooling in Advanced Packaging
DESCRIPTION:Thesis Title : "Design and Development of Hybrid Capillary-Wicking and Micro-Delivery Architectures for Cooling in Advanced Packaging"\n\nName of the Student : Mr. Nishant Kumar Sharma\nDegree Registered   : Ph.D. (Engineering) \nAdvisor             : Prof. Prosenjit Sen\, CeNSE\nDate                 : 23rd July 2026 (Thursday) 4:00PM\n\nVenue               : CeNSE Seminar Hall\nAbstract:\n\nThe continued increase in power density and integration complexity of modern electronic systems\,\n such as AI accelerators\, high-performance processors\, and heterogeneous chiplet-based systems\, \nhas made high-heat-flux thermal management a critical bottleneck in advanced packaging. \nAlthough logic circuits typically dissipate spatially averaged heat fluxes on the order of 10-100 W cm⁻²\, \nwhile operating below approximately 100-80 °C\, localized near-junction hotspots can exceed 1 kW cm⁻². \nSuch highly non-uniform thermal loads generate severe temperature gradients\, thermo-mechanical stresses\, \ninterfacial deformation\, and accelerated material degradation\, ultimately compromising device reliability. \nThus\, emphasizing the need for cooling technologies capable of removing intense\, localized heat fluxes at \nsmall temperature differences. Conventional heat spreaders\, vapor chambers\, and cold plates primarily reject \nheat at the package boundary and are therefore limited by intervening thermal resistances and restricted \naccess to buried hotspots. This thesis develops a multiscale thermal-management framework that integrates \npassive capillary liquid transport\, phase-change heat removal\, closed-loop cooling\, and vertical thermal \nrouting for advanced electronic packages.\n\nThe first part of the work investigates hierarchical nano-textured superhydrophilic wicks to improve the \nsurface wettability for liquid transport. Their liquid-transport behavior is examined through capillary rise\, \nwire-level hemiwicking\, junction-mediated liquid accumulation\, pore initiation\, meniscus evolution\, and pore filling. \nGeometrical\, energetic\, and transport frameworks are developed to understand the hemi-wicking and pore-wicking dynamics. \nThe results demonstrate that wick performance is governed by a coupled balance among capillary pressure\, liquid-storage \ncapacity\, wire-junction connectivity\, and pore accessibility.\n\nThe thermal performance of these nano-textured surfaces is subsequently characterized under capillary-fed operation. \nDistinct regimes of sub-saturated evaporation\, onset of nucleate boiling\, stable liquid-film boiling\, meniscus recession\, \nand capillary dryout are identified. Comparisons between mesh geometries and layer numbers reveal that local evaporation \nefficiency and maximum sustainable heat flux are controlled by different structural features. Multilayer configurations \nfurther enhance performance through parallel liquid pathways\, interlayer channels\, additional liquid-vapor interfaces\, \nand improved rewetting. The capillary evaporators are further evaluated in open- and closed-loop configurations for direct-on-chip cooling.\n\nTo address hotspots that cannot be contacted directly\, high-density interconnect structures are developed as \nvertical thermal conduits for routing heat from buried device regions to an accessible surface where a \ncapillary-fed evaporator can be integrated. These interconnects were further explored for high-density\, \nlow-pitch direct metal-to-metal bonding for heterogeneous integration of chiplets\, both for low-thermal-budget\nand thermally sensitive substrates. In addition\, a shape-memory-alloy-actuated peristaltic micropump is developed \nas an enabling component for controlled fluid delivery and active augmentation of closed-loop operation. \nA thermally decoupled mechanical isolation interface is introduced to transmit actuation while limiting \nparasitic heat leakage from the actuator to the fluidic conduit.\n\nTogether\, this work establishes an advanced packaging-oriented thermal framework that combines passive \ncapillary replenishment\, thin-film evaporation\, capillary-fed boiling\, closed-loop operation\, and vertical \nheat routing. The developed concepts provide design principles for compact cooling architectures in heterogeneous electronic packages.
URL:https://www.cense.iisc.ac.in/event/thesis-colloquium-design-and-development-of-hybrid-capillary-wicking/
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BEGIN:VEVENT
DTSTART;TZID=Asia/Kolkata:20260731T160000
DTEND;TZID=Asia/Kolkata:20260731T170000
DTSTAMP:20260717T051859Z
CREATED:20260717T051711Z
LAST-MODIFIED:20260717T051859Z
UID:10692-1785513600-1785517200@www.cense.iisc.ac.in
SUMMARY:[Seminar] : Quantum control of spin qubits with classical nanomagnets
DESCRIPTION:Speaker: Prof. Jayasimha Atulasimha\, Professor\, Mechanical and Nuclear Engineering\, \nVirginia Commonwealth University Richmond\, Virginia\, USA. \n\nTitle: "Quantum control of spin qubits with classical nanomagnets".\n\nDate: Friday\, 31st July 2026 - Time: 4 PM\n\nHi-Tea & Coffee: 5 PM\n\nVenue: CeNSE Seminar Hall\n\nAbstract:\nOur group has demonstrated energy-efficient electrical control of nanoscale magnetisation \ndynamics using strain-mediated voltage control [1]\, and voltage control of magnetic anisotropy \n[2] in nanomagnets and skyrmions\, respectively. These have found applications in implementing \nnon-volatile memory [1\,2] and neuromorphic computing [3]. However\, such nanomagnets can generate \nhighly confined microwaves to control the quantum state of proximally located spin qubits.\n\nThis talk will discuss the use of microwaves generated by voltage-controlled magnetisation dynamics \nin nanomagnets [4]to implement single-qubit quantum gates with fidelities approaching state-of-the-art \n[4] in a scalable manner. We will also discuss recent experiment work demonstrating coherent quantum \ncontrol of a single nitrogen vacancy (NV) centre in diamond with microwave fields generated from\nproximally located shape-anisotropic nanomagnets of lateral dimensions down to 200 nm x 180 nm\, \ndriven remotely by surface acoustic wave (SAW) excitation [5]. Specifically\, high-contrast Rabi \noscillations have been demonstrated. Additionally\, we report relaxometry using microwave pulses \ngenerated by such proximally located nanomagnets that can be orders of magnitude more efficient \nthan using a conventional antenna [5].  Such localised and energy-efficient control has potential \nto lead to scalable quantum computing and sensing with NV defects in diamond and other spin qubits.\n\nFinally\, we have shown that it is possible to control of spin qubits using SOT-driven nanomagnets [6] \nthat are at least an order of magnitude more efficient and have higher gate speeds than conventional \nElectron Spin Resonance (ESR) driven spin qubits\, while they have gate speeds comparable to Electron \nDipole Spin Resonance (EDSR) driven spin qubits with an order of magnitude higher coherence times [6].\n\nReferences\n\n[1] Nano Letters\, 16\, 1069\, 2016; ACS Applied Materials & Interfaces\, 17\, 48\, 65946\, 2025.\n\n[2] Nature Electronics 3\, 539\, 2020.\n\n[3] Neuromorph. Comput. Eng. 2 044011\, 2022; Nano Lett.\, 25\, 42\, 15369\, 2025\n\n[4] Communication Physics 5\, 284\, 2022; Phys. Rev. Applied 22\, 064077\, 2024.  \n\n[5] Nature Communications (2026). https://doi.org/10.1038/s41467-026-73087-z\n[6] https://arxiv.org/abs/2606.00824\nAcknowledgement: This work was funded by the US National Science Foundation ExpandQISE grant # 2231356\n\nBiography:\nJayasimha Atulasimha is an Engineering Foundation Professor of Mechanical and Nuclear Engineering \nwith a courtesy/affiliate appointment in Electrical and Computer Engineering and Physics at the \nVirginia Commonwealth University (VCU) where he is also the Associate Director for Research and \nInnovation for the Institute for Sustainable Energy and Environment (ISEE). His current research \ninterests include nanomagnetism\, spintronics\, non-volatile memory\, hardware AI and quantum computing. \nHe is a fellow of the ASME\, an IEEE Senior Member and past chair of the Technical Committee on \nSpintronics\, IEEE Nanotechnology Council. He has been a summer visiting faculty at the \nIndian Institute of Science Quantum Technology Initiative (IQTI) since 2022.\n\nHost Faculty:  Prof. Ambarish Ghosh
URL:https://www.cense.iisc.ac.in/event/seminar-quantum-control-of-spin-qubits-with-classical-nanomagnets/
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