At&t Bell Laboratories

Robert A Morgan

Lucian Arthur D'Asaro

Leo M Chirovsky

Philip J Anthony

Gou-Chung Chi

Vincent D Mattera

James N Hollenhorst

Dirk J Muehlner

Substrate-supported optical device structures such as, e.g., quantum-well infrared detectors/detector arrays are provided with a grating for optical coupling. Preferred gratings are formed in a nonepitaxial layer which, preferably, consists of a material which is different from underlying semiconductor material. Conveniently, a grating pattern is formed by etching, with the underlying material serving as an etch stop. For example, on a GaAs--AlGaAs device, polycrystalline silicon can be deposited and etched in this fashion.

Optical device including a grating

Substrate-supported optical device structures such as, e.g. quantum-well infrared detectors/detector arrays are provided with a grating for optical coupling. A binary, reflection grating is designed so that nh is approximately equal to .lambda./4 where n is the refractive index of the grating, h is the thickness of the grating, and .lambda. is a wavelength of interest.

A light emitting device uses a vertical cavity surface emitting laser having a voltage controlled mirror which is used, for example, to turn the laser ON and OFF by varying the reflectivity of one mirror forming the laser cavity.

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Topton, PA, United States of America

Robert A Morgan