Mid-wavelength infrared type-II InAs/GaSb superlattice interband cascade photodetectors

Wioletta Pusz; Andrzej Kowalewski; Piotr Martyniuk; Waldemar Gawron; Elena Plis; Sanjay Krishna; Antoni Rogalski

doi:10.1117/1.OE.53.4.043107

8 April 2014 Mid-wavelength infrared type-II InAs/GaSb superlattice interband cascade photodetectors

Wioletta Pusz, Andrzej Kowalewski, Piotr Martyniuk, Waldemar Gawron, Elena Plis, Sanjay Krishna, Antoni Rogalski

Author Affiliations +

Optical Engineering, Vol. 53, Issue 4, 043107 (April 2014). https://doi.org/10.1117/1.OE.53.4.043107

Abstract

Recently, a new strategy to achieve high-operating temperature (HOT) infrared photodetectors to include cascade devices and alternate materials such as type-II superlattices has been observed. Another method to reduce dark current is related to the limitation of the volume of detector material via a concept of a photon-trapping detector. The performance of an innovative HOT detector designing so-called interband (IB) cascade type-II MWIR InAs/GaSb superlattice detectors is presented. Detailed analysis of the detector’s performance (such as dark current, RA product, current responsivity, and response time) versus bias voltage and operating temperatures (220 to 400 K) is performed, pointing out the optimal working conditions. At the present stage of technology, the experimentally measured R₀A values of the IB cascade type-II superlattice detectors at room temperature are higher than those predicted for HgCdTe photodiodes. It is shown that these HOT detectors have emerged as the competitors of HgCdTe photodetectors.

Citation Download Citation

Wioletta Pusz, Andrzej Kowalewski, Piotr Martyniuk, Waldemar Gawron, Elena Plis, Sanjay Krishna, and Antoni Rogalski "Mid-wavelength infrared type-II InAs/GaSb superlattice interband cascade photodetectors," Optical Engineering 53(4), 043107 (8 April 2014). https://doi.org/10.1117/1.OE.53.4.043107

Published: 8 April 2014

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