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Long Wavelength Shifting and Broadening of Quantum Well Infrared Photodetector Response Via Rapid Thermal Annealing

  • D.K. Sengupta (a1), W. Fang (a1), J.I. Malin (a1), H.C. Kuo (a1), T. Horton (a1), A. Curtis (a1), N.F. Gardner (a1), B. Flachsbart (a1), W. Wohlmuth (a1), D. Turnbull (a1), S.L. Chuang (a1), K. C. Hsieh (a1), K.Y. Cheng (a1), I. Adesida (a1), M. Feng (a1), S.G. Bishop (a1) and G. E. Stillman (a1)...

Abstract

A shift in the peak response wavelength and a broadening of the photoresponse spectrum is demonstrated for intersubband absorption in n-doped GaAs/AIGaAs multiple quantum well detectors following intermixing of the well and barrier layers during rapid thermal annealing. In general, a decrease in performance is observed for the RTA QWIPs when compared to the as-grown detectors. The peak absolute response of the annealed QWIPs is lower by almost a factor of four, which results in corresponding decrease in quantum efficiency. In addition, the noise performance results in a detectivity which is five times lower than that of QWIPs fabricated from as-grown structures.

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Long Wavelength Shifting and Broadening of Quantum Well Infrared Photodetector Response Via Rapid Thermal Annealing

  • D.K. Sengupta (a1), W. Fang (a1), J.I. Malin (a1), H.C. Kuo (a1), T. Horton (a1), A. Curtis (a1), N.F. Gardner (a1), B. Flachsbart (a1), W. Wohlmuth (a1), D. Turnbull (a1), S.L. Chuang (a1), K. C. Hsieh (a1), K.Y. Cheng (a1), I. Adesida (a1), M. Feng (a1), S.G. Bishop (a1) and G. E. Stillman (a1)...

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