Room temperature and high responsivity short wavelength II-VI quantum well infrared photodetector

Arvind P. Ravikumar, Guopeng Chen, Kuaile Zhao, Yue Tian, Paul Richard Prucnal, Maria C. Tamargo, Claire F. Gmachl, Aidong Shen

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

We report the experimental demonstration of a room temperature, high responsivity, short wavelength II-VI Zn0.51Cd0.49Se/ Zn0.29Cd0.26Mg0.45Se based quantum well infrared photodetector operating between 3 and 5 μm. Spectral response was observed up to room temperature with a cut off wavelength of 5 μm at 280 K. Measurements with a calibrated blackbody source yielded a peak responsivity of over 30 A/W at 280 K and an applied bias of -3 V. The dark current limited peak detectivity at 80 K and 280 K were measured to be 2 × 109 cm Hz/W and 4 × 107 cm Hz/W, respectively. These results are consistent with theoretical calculations that predict a maximum detectivity of the order of 107 cm Hz/W at room temperature for typical carrier lifetimes and optimized doping levels.

Original languageEnglish (US)
Article number161107
JournalApplied Physics Letters
Volume102
Issue number16
DOIs
StatePublished - Apr 22 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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