High responsivity InGaAsSb p-n photodetector for extended SWIR detection

I. Shafir, N. Snapi, D. Cohen-Elias, A. Glozman, O. Klin, E. Weiss, O. Westreich, N. Sicron, M. Katz

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A molecular beam epitaxy-grown InGaAsSb p-n photodetector lattice matched to GaSb for extended short wave infrared is reported. Electrical and optical characteristics were analyzed at temperatures from 200 K to room temperature. The photodetectors exhibit dark current densities of 2.9 × 10-6 A/cm2 at 200 K and 4.6 mA/cm2 at 300 K (-0.1 V bias) and a high quantum efficiency of 73% at room temperature under front side illumination. High detectivity (D*) values of 2.2 × 1010 cm·Hz1/2 W-1 and 7.4 × 1011 cm·Hz1/2 W-1 were observed at 200 K and room temperature, respectively.

Original languageEnglish
Article number063503
JournalApplied Physics Letters
Issue number6
StatePublished - 8 Feb 2021
Externally publishedYes

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