Uncooled operation of type-II InAs∕GaSb superlattice photodiodes in the midwavelength infrared range
- 3 June 2005
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 86 (23), 233106
- https://doi.org/10.1063/1.1947908
Abstract
We report high performance uncooled midwavelength infrared photodiodes based on interface-engineered superlattice. Two distinct superlattices were designed with a cutoff wavelength around for room temperature and 77 K. The device quantum efficiency reached more than 25% with responsivity around . Detectivity was measured around at room temperature and at 77 K under zero bias. The devices were without antireflective coating. The device quantum efficiency stays at nearly the same level within this temperature range. Additionally, Wannier–Stark oscillations in the Zener tunneling current were observed up to room temperature.
Keywords
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