GaAs/AlGaAs quantum-well infrared photodetectors on GaAs-on-Si substrates

D. K. Sengupta, W. Fang, J. I. Malin, J. Li, T. Horton, A. P. Curtis, K. C. Hsieh, S. L. Chuang, H. Chen, M. Feng, G. E. Stillman, L. Li, H. C. Liu, K. M.S.V. Bandara, S. D. Gunapala, W. I. Wang

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


In this letter, we describe the characteristics of molecular beam epitaxy GaAs/AlGaAs quantum-well infrared photodetectors (QWIP's) grown on a GaAs substrate, and on a GaAs-on-Si substrate produced by metalorganic chemical-vapor deposition. Important issues for QWIP applications such as dark current, spectral response, and absolute responsivity are studied. We find that compared to a similar detector structure grown on a GaAs substrate, the detector grown on a GaAs-on-Si substrate exhibits similar dark current and absolute responsivity while displaying a small blueshift in the spectral response.

Original languageEnglish
Pages (from-to)78-80
Number of pages3
JournalApplied Physics Letters
Issue number1
Publication statusPublished - 1997 Jul 7

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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