Influence of optical interference on quantum well infrared photodetectors in a 45° waveguide geometry

Autor:	C. Schönbein, Peter Koidl, Harald Schneider, G. Weimann, Markus Walther
Rok vydání:	1999
Předmět:	Electromagnetic field Physics Physics and Astronomy (miscellaneous) business.industry Photodetector Interference (wave propagation) Waveguide (optics) Responsivity Optics Electric field Optoelectronics business Quantum well infrared photodetector Quantum well
Zdroj:	Applied Physics Letters. 74:16-18
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.123119
Popis:	Standing light waves caused by the interference of incident and reflected beams lead to a spatial modulation of the electromagnetic field within the active region of a quantum well infrared photodetector (QWIP). The optical excitation—determined by the electric field component perpendicular to the quantum well plane—is thus inhomogeneous, influencing the QWIP responsivity and its voltage dependence. The inhomogeneity can be suppressed by using mesa photodetectors where only half of the top contact is covered with metal.
Databáze:	OpenAIRE
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