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DTSTART;TZID=America/New_York:20250729T113000
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SUMMARY:ESE Guest Seminar: "On-Device Probabilistic AI: From Gaussian Transistors to Light-Driven Spike Encoding"
DESCRIPTION:Emerging edge AI systems call for device-level approaches that are inherently low-power\, secure\, and capable of managing uncertainty. In this talk\, I will share our recent exploratory efforts toward realizing on-device probabilistic intelligence using custom-designed semiconductor devices. I will introduce Gaussian transistors that support analog Gaussian activation and probabilistic inference by harnessing device-level variability. These devices offer a potential path for implementing Bayesian operations directly at the transistor level. In parallel\, we have been developing photo-spike photodetectors that convert light fluctuations into asynchronous spike trains\, functioning as both neuromorphic input interfaces and entropy sources for physical randomness. While still in early stages\, the combination of these platforms suggests a promising direction for hardware-embedded probabilistic learning\, secure classification\, and physical random number generation. This work aims to show how tuning the physics of emerging devices may open up new opportunities for edge AI systems.
URL:https://seasevents.nmsdev7.com/event/ese-guest-seminar-on-device-probabilistic-ai-from-gaussian-transistors-to-light-driven-spike-encoding/
LOCATION:Room 221\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Colloquium
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
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DTSTART;TZID=America/New_York:20250730T090000
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SUMMARY:ESE Ph.D. Thesis Defense: "Novel van der Waals Chalcogenides for Sustainable Light Harvesting"
DESCRIPTION:The global climate crisis demands a shift to renewable energy sources. Solar photovoltaics (PVs) are widely considered the most feasible renewable technology to meet global energy demands\, and solar photo-electrocatalysis is a promising approach to decarbonize industrial chemical production. However\, scaling solar energy harvesting technologies to meet energy demands must be done economically and sustainably\, minimizing materials consumption\, toxicity\, energy intensity of the processing\, and cost per watt. \nMy research aims to leverage the strong light-matter interaction of van der Waals (vdW) chalcogenides for solar energy harvesting with drastically reduced materials consumption while also developing low-cost solution processing of elemental vdW chalcogenides for PVs. In this defense\, I present work to (i) engineer vdW metal dichalcogenide nanophotonic structures to achieve broadband near unity solar absorption in extremely thin (18 nm) layers; (ii) apply hybrid light-matter states sustained by thin films of vdW metal dichalcogenides to PVs; and (iii) develop a precursor and process to fabricate thin film elemental chalcogenide PVs with widely tunable bandgaps from solution phase for low cost\, low temperature manufacturing without extremely hazardous solvents. Overall\, these contributions offer potential paths for materials processing and optical design to make future solar energy technologies more sustainable.
URL:https://seasevents.nmsdev7.com/event/ese-ph-d-thesis-defense-novel-van-der-waals-chalcogenides-for-sustainable-light-harvesting/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Dissertation or Thesis Defense
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
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