Influence of optical interference on quantum well infrared photodetectors in a 45° waveguide geometry
- 4 January 1999
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 74 (1) , 16-18
- https://doi.org/10.1063/1.123119
Abstract
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 metalKeywords
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