Quantum well based two-dimensional detector for IR radiation...

Details Quantum well based two-dimensional detector for IR radiation... Quantum well based two-dimensional detector for IR radiation...

2005-06-21

2005-06-21

Hannaher, Constantine (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

Reexamination Certificate

active

06909096

ABSTRACT:
A quantum well based two-dimensional detector (1) for detecting infrared radiation which receives infrared radiation falling upon its detector surface (1a) at various angles of incidence. The detector comprises a grating arrangement for diffraction of the incident radiation. The arrangement is selected with a grating interval which varies or changes from the central part of the detector. out towards the outer parts of the detector. The variation or change in the grating interval is arranged to retain in the detection diffracted rays of the orders 1 and −1 as active components over the whole detector surface by changing the angle values of the diffracted rays depending upon the angles of incidence of the radiation falling on various parts of the detector surface.

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K.L. Tsai et al., Two-Dimensional Bi-Periodic Grating Coupled One- and Two-Color Quantum Well Infrared Photodetectors, IEEE Electron Device Letters, vol. 16, No. 2, Feb. 1995 p. 49-51.

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