Intersubband transitions and IR hot-electron transistors

Kwong-Kit Choi; Monica Alba Taysing-Lara; Peter G. Newman; Wayne H. Chang

doi:10.1117/12.138639

10 December 1992 Intersubband transitions and IR hot-electron transistors

Kwong-Kit Choi, Monica Alba Taysing-Lara, Peter G. Newman, Wayne H. Chang

Proceedings Volume 1735, Infrared Detectors: State of the Art; (1992) https://doi.org/10.1117/12.138639
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

We present a systematic theoretical and experimental study on wavelength tuning and absorption lineshape of single bound state quantum well infrared photodetectors. We found that the absorption energy is determined by the energy level structure above the barriers as well as the shape of the quantum well ground state wave function. We calculated the absorption lineshape and show that it depends sensitively on the position of the final state relative to the global band structure of the detector. Using a quantum barrier as an electron energy high pass filter to discriminate against the lower energy dark current, we are able to increase the detectivity of the detector. The new device is referred as an IR hot-electron transistor. Its potential advantages in focal plane array applications will be discussed.

Citation Download Citation

Kwong-Kit Choi, Monica Alba Taysing-Lara, Peter G. Newman, and Wayne H. Chang "Intersubband transitions and IR hot-electron transistors", Proc. SPIE 1735, Infrared Detectors: State of the Art, (10 December 1992); https://doi.org/10.1117/12.138639

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