Elsevier

Surface Science

Volumes 361–362, 20 July 1996, Pages 401-405
Surface Science

Nonlinear resonant optical rectification in a coupled quantum well

https://doi.org/10.1016/0039-6028(96)00431-1Get rights and content

Abstract

We have measured the rectification of far-infrared radiation resonant with the lowest intersubband transition of an AlGa/AsGaAs asymmetric coupled double-quantum well in which the subband spacing is 11 meV. From these measurements we can extract an intersubband lifetime of 1.2 ± 0.4 ns at low excitation intensity and T = 10K, which appears promising for devices which can operate at low excitation and temperature, such as FIR detectors or mixers. From simultaneous measurements of the optical rectification and of the intersubband absorption coefficient we can determine the intensity-dependent intersubband lifetime, which shows a strong decrease for increasing intensities.

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Cited by (1)

  • Nonlinear optical rectification associated to exciton states in asymmetric coupled double quantum wells

    2013, Physica E: Low-Dimensional Systems and Nanostructures
    Citation Excerpt :

    The NOR related to intersubband transitions in a biased p-type QW was theoretically investigated by Tsang and Chuang [9]. In 1996, Unterrainer et al. reported the measurement of NOR in a ACDQW [10]. More recently, it is possible to find a number of works on NOR.

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