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(October 15)Hybrid Material and Device Platforms for Reconfigurable Integrated Nanophotonics
Oct 14, 2016


Hybrid  Material and Device Platforms for Reconfigurable Integrated Nanophotonics


Prof. Ali Adibi


10:00, October 15,  2016


405, Section III, West Building, North Campus

Lecturer  Profile

Ali  Adibi is the director of Bio and Environmental Sensing Technologies (BEST) and  a professor and Joseph M. Pettit chair in the School of Electrical and Computer  Engineering, Georgia Institute of Technology. His research group has pioneered  several structures in the field of integrated nanophotonics for both  information processing and sensing. He is the author of more than 150 journal  papers and 400 conference papers. He is the editor-in-chief of the Journal of Nanophotonics,  and the Nanophotonic program track chair of the Photonics West meeting. He is  the recipient of several awards including Presidential Early Career Award for  Scientists and Engineers, Packard Fellowship, NSF CAREER Award, and the SPIE  Technology Achievement Award. He is also a fellow of OSA, SPIE, and AAAS.

Lecture  Abstract

The development of  ultra-compact integrated nanophotonic structures for communications, sensing,  and signal processing has been of great interest lately. Recent progress in the  development of miniaturized high-Q microresonators has resulted in orders of  magnitude reduction in the size of functional integrated photonic structures.  The possibility of low-power tuning of the resonance features in these  structures has made the formation of reconfigurable photonic structures  possible.
Among existing  CMOS-compatible substrates, silicon (Si) and silicon nitride (SiN) have been  used the most. Despite impressing progress in Si-based and SiN-based integrated  photonics, neither substrate alone can be used for practical applications. Si  (despite its good reconfigurability) suffers from strong nonlinear effects  (especially at high light intensities) and relatively large free-carrier loss  while SiN (with one order of magnitude lower loss and lower nonlinearity  compared to Si) is very hard to tune. Thus, a reliable material system that  combines ultra-loss-loss and high power handling with efficient and fast  reconfigurability is of high demand in integrated nanophotonics.

In this talk, the  recent achievements in the development and optimization of hybrid multi-layer  CMOS-compatible material systems (e.g., SiN/Si, multi-layer Si/SiO2, etc.) to  address all the practical requirements of ultra-fast and ultra-compact  integrated photonic structures will be discussed. Using these hybrid material  systems, a series of ultra-compact and high-performance reconfigurable photonic  devices and subsystems that are formed by using high Q resonators will be  demonstrated. The use of these devices and subsystems for realization of  densely-integrated reconfigurable photonic chips for signal processing and  sensing applications will be discussed.

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