Title: Semiconductor Nanostructure-Based Photonic Devices for Ultrafast, Power-Efficient Systems

Speaker: Prof.Osamu Wada (JSPS Beijing Office, Beijing, and Visiting, Kobe University, Japan)

Time: Am 10:00, April 25, 2013

Venue: Academic Salon Room, IOS, CAS

Abstract: In order to support the ever increasing bandwidth demand in communication networks and signal processing systems, ultrafast, high-performance photonic devices are prerequisite. On the other hand, power consumption of signal switching/routing systems is considered to become a serious bottleneck in scaling up the bandwidth. The development of high-performance, power-efficient photonic devices are therefore crucial in tackling this problem. This talk first reviews the present status and issues of photonic systems and devices and then discusses recent technical developments of photonic devices based on semiconductor nanostructures, with a particular focus on ultrafast signal processing devices based on quantum dot (QD) materials which include QD-based semiconductor optical amplifiers (SOAs) and QD-based vertical cavity all-optical switches.

About speaker：Osamu Wada received the BE degree in 1969 at Himeji Institute of Technology and ME degree in 1971 at Kobe University, both in Japan and the Ph.D. degree in 1980 at the University of Sheffield, UK. He was with Fujitsu Laboratories Ltd. in 1971-1996, being engaged in research on III-V semiconductor materials and devices such as LEDs, lasers, photodiodes, and optoelectronic integrated circuits (OEICs) for telecom and interconnect systems. In 1996-2001, he developed femtosecond ultrafast all-optical switches at FESTA Labs., Tsukuba, Japan. During 2001-2010, he was a Professor at Kobe University and headed a group on nanostructure materials and ultrafast devices. He is a Fellow of IEEE, OSA, IEICE, and JSAP. He is currently Director of Japan Society for the Promotion of Science (JSPS) Beijing Office.