SUNMONTUEWEDTHUFRISAT
Events for December 04, 2006
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Waveguiding in Periodic Coupled Micro-resonator
Mon, Dec 04, 2006 @ 10:00 AM - 11:00 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Joyce PoonCalifornia Institute of TechnologyAbstract:
Coupled-Resonator Optical Waveguides (CROWs) are chains of resonators in which light propagates by virtue of the coupling between the resonators. The dispersive properties of these waveguides are controllable by the inter-resonator coupling and the geometry of the resonators. For example, if the inter-resonator coupling is weak, light can be engineered to propagate slowly in CROWs. The small group velocities possible in CROWs may enable applications in and technologies for optical delay lines, interferometers, buffers, nonlinear optics, and lasers. In this presentation, I will report on our progress in achieving and controlling optical delay in passive and active CROWs. Both theoretical and experimental results will be presented. I will show how transfer matrices can be used to analyze and design a variety of coupled resonator systems. I will also present measurements of the spectral and group delay properties of high-order (>10) coupled polymer microring resonators. Finally, I will discuss our ongoing work on active CROWs in III-V semiconductors for loss compensation and electrical control.Brief Biography:
Joyce Poon is a Ph.D. candidate in Electrical Engineering at the California Institute of Technology (Caltech) in the group of Prof. Amnon Yariv. She received the M.S. in Electrical Engineering in 2003 from Caltech and the B.A.Sc. in Engineering Science (Physics Option) from the University of Toronto in 2002. She is grateful for fellowships from the Natural Science and Engineering Research Council of Canada (NSERC), OSA Dekker Foundation, and IEEE-LEOS for supporting her graduate studies. Joyce's current research is on slow light propagation in coupled resonators, polymer microrings, and compound semiconductor (InP-InGaAsP) resonator devices. Her research interests include the theory, design, and experimental studies of optical wave propagation in waveguides, micro-resonators, and periodic structures for active and passive photonics.
Location: Hedco Neurosciences Building (HNB) - 100
Audiences: Everyone Is Invited
Contact: Ericka Lieberknecht
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Quantum Network Communication -- The Butterfly and Beyond
Mon, Dec 04, 2006 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
SPEAKER: Prof. Debbie Leung, University of WaterlooABSTRACT: We study the communication of quantum information in networks of (directed) quantum channels. We consider the asymptotic rates of high fidelity quantum communication between specific sender-receiver pairs. In networks that are shadow, we find that rerouting of quantum information is optimal. Consequently, the achievable rate regions are given by counting edge avoiding paths, and precise achievable rate regions can be obtained. Slight twists to the above results are obtained when side classical channels are available. These complete solutions apply to many networks, including the butterfly network.Joint work with Jonathan Oppenheim and Andreas WinterBio: After a B.S. in Ph/Ma from Caltech in 1995, Debbie completed a PhD on Robust quantum computation at Stanford in 2000 under the supervision of Prof. Yoshihisa Yamamoto and Prof. Isaac Chuang. She then worked at IBM TJ Watson Research Center in 2000-2002, MSRI in 2002, and Caltech in 2003-2005 on quantum communication and cryptography. She joined the Institute for Quantum Computing and the Department of Combinatorics and Optimization at the University of Waterloo in 2005.Host: Prof. Igor Devetak, devetak@usc.edu
Location: Frank R. Seaver Science Center (SSC) - 319
Audiences: Everyone Is Invited
Contact: Mayumi Thrasher
