"Novel Integrable Semiconductor Laser Structures"
Dr. James Coleman
University of Illinois, Urbana, IL
LEOS Distinguished Speaker, Presentation at NRC in Ottawa, March 23, 1998
Reliable and inexpensive discrete semiconductor photonic devices, such
as CD, CDROM, and laser printer lasers, are commonly available and
plentiful. Electronic integrated circuits have reached very high levels
of integration and can contain more than 5 million transistors.
Integrated photonic structures - those in which all of the devices are
used to process only optical signals - are relatively simple, with the
level of integration usually measured in single digits. The two main
reasons for this are that 1) small lateral dimensions for photonic
devices always present a processing challenge and 2) the optimum
semiconductor layer structure is different for each optical element,
complicating the growth process. In this talk, we will describe recent
advances in the structures, materials, and processing of integrated
photonic devices. We will introduce integrable laser resonator
structures that allow controlled coupling of light between elements and
avoid the complications of cleaved facets. We will outline a
selective-area epitaxial growth process that allows the formation of
layered structures optimized separately anywhere on the wafer for the
desired functionality. Finally, we will describe some unique integrated
devices that make use of these technologies.
James J. Coleman received the B.S., M.S., and Ph.D. degrees in
electrical engineering from the University of Illinois, Urbana. He was a
Member of Technical Staff at Bell Laboratories, Murray Hill, NJ
(1976-1978) and at Rockwell International, Anaheim, CA (1978-1982).
Since 1982 he has been a Professor in the Department of Electrical and
Computer Engineering, University of Illinois, Urbana. He and his
students are involved in the study of quantum-well heterostructures,
superlattices, strained layer lasers, laser arrays, and integrable
lasers by selective area epitaxy. Professor Coleman is an Associate
Editor of Photonics Technology Letters and has served as Guest Editor
for two Special Issues of the IEEE Journal of Quantum Electronics. He
was the recipient of a Beckman Research Award in 1982 and was a Rank
Prize Funds Lecturer in 1992. He is a Fellow of the IEEE, the Optical
Society of America, and the American Association for the Advancement of
Center for Compound
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