Texas Instruments Corporation

C Grady Roberts

Michael A Kinch

Photocapacitive detectors with varying bandgap Hg.sub.1-x Cd.sub.x Te (604) for two color detection and one color detection with increased potential well capacity. Preferred embodiments include a transparent insulated gate (608) on a top layer (632) of Hg.sub.0.8 Cd.sub.0.2 Te over a lower layer (634) of Hg.sub.0.83 Cd.sub.0.27 Te for detection of two infrared colors by varying gate potential to either confine the potential well to the top layer or to extend the potential well to both layers. Also, methods of compositionally grading the Hg.sub.1-x Cd.sub.x Te by fluid transport plus diffusion.

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McKinney, TX, United States of America

C Grady Roberts