Photonic Materials
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matic progress in optical fiber and compound semiconductor materials technologies. Likewise, future opportunities in photonic switching and information processing will depend critically on the development of improved photonic materials. The future role of optics in these conventionally electronic technologies, and the extent of that role, depends on whether materials can be designed and fabricated with the required characteristics.
Future opportunities in photonic switching and information processing will depend critically on the development of improved photonic materials. The articles in this issue will focus on some of the recent advances and current limitations of photonic materials for these emerging applications. My article, "Materials for Photonic Switching and
Information Processing," will introduce the various materials Systems being actively investigated for photonic switching and information processing, together with the relative merits and tradeoffs of each approach for future devices. R.A. Becker reviews the materials, device designs, and ränge of applications of "Optical-Guided-Wave Modulators." The devices have become commercially available during the past three years, and products ränge from simple phase modulators to 8x8 switching matrices. G.A. Meredith considers "Organic Materials for Nonlinear Optics," presenting an overview of the basis for and the many directions of invention and research. D.Z. Anderson not only conveys enthusiasm for a "fledgling optical technology" in "Materials Demands for Optical Neural Networks" but also describes recent research, explains the general principles of neural network modeis, and isolates some of the pivotal materials issues. A.R. Tanguay, Jr. thoroughly examines the fundamental "Physical and Technological Limitations of Optical Information Processing and Computing." He discusses the nature of computation from the perspective of identifying technology-independent limits and provides an example of a technologydependent limit in the context of photorefractive volume holographic optical interconnections. D
MRS BULLHIN Covers the Significant Developments and Trends in Materials Research Bring the significant developments at your institution to the attention of your colleagues around the world. Ask your public relations department to send information for inclusion in the BULLETIN to: Editor, MRS BULLETIN 9800 McKnight Road, Suite 327, Pittsburgh, PA 15237 Telephone (412) 367-3036, Fax (412) 367-4373
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MRS BULLETIN/AUGUST 1988
Photonic Materials
Alaslair M. Glass
Dana Z. Anderson
Gerald R. Meredith
Armand R. Tanguay, Jr.
Alastair M. Glass, Guest Editor for this issue of the MRS BULLETIN, is head of the Optical Materials Research Department of AT&T Bell Laboratories, Murray Hill, New Jersey. He received a PhD in physics from the University of British Columbia, Canada and a BSc from the University of London, England. Since joining Bell Laboratories, Glass has been involved with a wide variety of studies of optical and electrical effects in semiconductors,
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