Interband cascade detectors with room temperature photovoltaic operation

Jian V. Li, Rui Q. Yang, Cory J. Hill, Shun Lien Chuang

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

We investigated mid-infrared interband cascade laser structures as photodetectors, which are sensitive to normal incidence and operate in photovoltaic mode at room temperature. The proposed operation principle of these interband cascade detectors is based on the unique combination of interband photoexcitation and the much faster intersubband relaxation as well as interband tunneling recombination, which allows for the efficient collection of the photoexcited carriers. Peak responsivity and detectivity of 21 mA/W and 7.1×108 cm Hz12W at λ=4.0 μm are obtained for a device with cutoff wavelength of 4.4 μm. Peak responsivity and detectivity of 46 mA/W and 1.4×109 cm Hz12W at λ=3.0 μm are obtained for another device with cutoff wavelength of 3.3 μm. These detectors exhibit low noise (4.8× 10-13 A Hz12) and a large product of the differential resistance and active area (19 Ω cm2) at room temperature.

Original languageEnglish
Article number101102
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number10
DOIs
Publication statusPublished - 2005 Mar 7

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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