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Optimized random/ordered grating for an n-type quantum well infrared photodetector (1999)

Borenstain, Shmuel I. ; Arad, U. ; Lyubina, I. ; [weitere]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 75 (1999), S. 2659-2661

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ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: Coupling efficiency of infrared radiation to electron intersubband transition in quantum well infrared photodetector by a two-dimensional (2D) grooved grating is examined. A resonant enhancement of the coupling efficiency at a certain optimal groove depth is predicted and confirmed experimentally. It is argued that a detector with a properly designed ordered cross grating performs better than a detector with optimized 2D random grating. In a detector with ordered grating a quantum efficiency of 75% is obtained with a doping level of only 3.5×1017 cm−3 in each quantum well and dark current density of 0.34 mA/cm2 at 78 K. © 1999 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.125110

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