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Controlling Light in Mesoscopic Systems: New Frontiers in Nonlinear, Ultrafast, Quantum and Precision Measurements

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What
  • Visitor Seminars
When Mar 18, 2013
from 02:00 PM to 03:30 PM
Where Engr. IV Bldg., Shannon Room 54-134
Contact Name
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Chee Wei Wong
Columbia University


Abstract
Recent advances in sub-wavelength nanoscale platforms have afforded the control of light from first principles, with impact to optoelectronics and high-density secure communications. In this talk I will highlight three coherent examples where emerging chip-scale architectures can make a difference. First, I will describe graphene-silicon hybrid circuits for ultrafast optical signal processing, enabled by the two-dimensional Dirac fermionic structure with its unique linear and massless dispersion. The single atomic layer not only enables an absorption defined by the fine structure constant but spectroscopically exhibits dramatically-large nonlinearities for chip-scale frequency conversion and advanced data formats.
Secondly, I will report on chip-scale frequency comb oscillators, where we have recently observed one of the shortest (74-fs) pulse mode-locking on-chip till date. The CMOS 115-GHz oscillators have potential to link the RF and optical domains with low single-sideband phase noise, with implications to precision optical clocks and astrophysical spectrography. Thirdly, I will describe coherent phase-stable interactions on-chip of single excitons and correlated photons for multiple-qubit per photon in fundamentally quantum-secure key generation and communications. The dispersion-engineered photonic crystals allow observations of localized states at the band edge, with resulting polariton states. Semiconductor phase stability allows higher-dimensional Hilbert space correlations in these emerging chip-scale architectures.

Biography
Chee Wei Wong advances the control of light in mesoscopic systems, focusing on nonlinear, ultrafast, quantum and precision measurements. He received the Doctorate of Science in 2003 and the Masters of Science in 2001, both from the Massachusetts Institute of Technology. From 1996 to 1999 he completed his double degree, B.Sc. highest distinction and B.A. highest distinction, both from the University of California at Berkeley.
He is the recipient of the 2009 3M Faculty Award, the 2008 NSF CAREER Award, and the 2007 DARPA Young Faculty Award. Since 2004 he is affiliated with Columbia University, and he has published 65+ journal articles, 100+ conference articles, 4 book chapters, received 10 awarded patents, and delivered 60+ invited talks at universities and industry. In his spare time, he enjoys playing the piano, running, and snowboarding. His work has appeared in Nature, Nature Photonics, Nature Scientific Reports, Physical Review Letters, Nano Letters amongst others.

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