Photoconductive response of PbTe doping superlattices
- 8 June 1987
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 50 (23), 1654-1656
- https://doi.org/10.1063/1.97758
Abstract
Doping superlattices made of PbTe exhibit excellent photoconductive response with a peak detectivity D*≥8×1010 cm Hz1/2 W−1, which is close to the theoretical limit at 6 μm wavelength. Lifetime and far‐infrared magneto‐optical investigations show that photogenerated electron‐hole pairs are separated in the periodic electrostatic potential, leading to a lifetime enhancement by nearly two orders of magnitude as compared to homogeneous bulk crystals.Keywords
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