Tunneling lifetime broadening of the quantum well intersubband photoconductivity spectrum

Levine, B. F.; Bethea, C. G.; Choi, K. K.; Walker, J.; Malik, R. J.
July 1988
Applied Physics Letters;7/18/1988, Vol. 53 Issue 3, p231
Academic Journal
We have measured, for the first time, the continuous infrared (λ∼10 μm) photoconductivity spectrum, for an intersubband absorption photoexcited tunneling quantum well detector. The line shape is broadened and asymmetrical with respect to the zero-bias Lorentzian absorption spectrum. We show that this is a result of the uncertainty principle lifetime broadening due to the rapid tunneling escape of the photoexcited electrons.


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