Séminaires et journées scientifiques
Slow Light Using Semiconductor Quantum Devices
Séminaire de la branche Physique
Mardi 20 Juin à 14H00
Salle Jacques Dorey
Onera -
Fort de Palaiseau - 91120 Palaiseau
Prof Shun-Lien Chuang
University of Illinois at Urbana-Champaign
Department of Electrical and Computer Engineering
Résumé
Recently there has been great interest in slow light for optical buffer applications for future advanced optical network systems. The speed of light is 300,000,000 meters per second in the vacuum. An important question is how we can control and slow down the group velocity of light using a dispersion medium. The central idea is to design a “variable” optical delay device, which preferably is semiconductor-based and the group velocity of the optical signal can be controlled by an external pump laser or by an electrical bias.
In this talk, I will discuss a few ideas of slow light including electromagnetically induced transparency (EIT), population oscillation due to exciton effects in quantum wells, carrier beating in semiconductor optical amplifiers, and a resonant cavity structure. I will present our most recent work on room temperature fast light and slow light using both bulk and quantum-dot semiconductor optical amplifiers (SOAs). I will then discuss a resonant cavity structure, which consists of an integrated distributed-feedback (DFB) laser and a phase-shifter section with multiple quantum wells, producing two coupled optical cavities. Our devices operate on a room-temperature semiconductor platform and requires only electrical or optical pumping, making integration into current optoelectronic systems feasible.
Shun-Lien Chuang received the Ph.D. degree from MIT in 1983. He then joined the University of Illinois at Urbana-Champaign, where he is currently a Professor and Director of the Illinois Program on Photonics and Optoelectronics. He was a visitor at a few institutions including Bell Laboratories; University of Tokyo, NTT, NASA, Fujitsu, Cavendish Laboratory, and ONERA.
He is conducting research on optoelectronic devices including strained semiconductor lasers, modulators, and infrared detectors. He is the author of Physics of Optoelectronic Devices, Wiley, 1995. He was an Associate Editor of the IEEE Journal of Quantum Electronics (1997 - 2003). He is a Fellow of the American Physical Society, IEEE and Optical Society of America. He received the Engineering Excellence Award from OSA in 2004 and is an IEEE LEOS Distinguished Lecturer in 2004-2006.
Détails pratiques
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