Resonant infrared detector with substantially unit quantum effic

Details Resonant infrared detector with substantially unit quantum effic Resonant infrared detector with substantially unit quantum effic

1992-01-28

1994-03-01

Crane, Sara W.

Active solid-state devices (e.g., transistors, solid-state diode

Responsive to non-electrical signal

Electromagnetic or particle radiation

257436, 25037014, H01L 2714, H01L 3100

Patent

active

052910555

ABSTRACT:
A resonant infrared detector includes an infrared-active layer which has first and second parallel faces and which absorbs radiation of a given wavelength. The detector also includes a first tuned reflective layer, disposed opposite the first face of the infrared-active layer, which layer reflects a specific portion of the radiation incident thereon and allows a specific portion of the incident radiation at the given wavelength to reach the infrared-active layer. A second reflective layer, disposed opposite the second face of the infrared-active layer, reflects back into the infrared-active layer substantially all of the radiation at the given wavelength which passes through the infrared-active layer. The reflective layers have the effect of increasing the quantum efficiency of the infrared detector relative to the quantum efficiency of the infrared-active layer alone.

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patent: 5122669 (1992-06-01), Herring et al.
Fowles, G., Introduction to Modern Optics, Holt, Rinehart, 1975, pp. 96-99.

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