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SpringerOpen, Nanoscale Research Letters, 1(6), 2011

DOI: 10.1186/1556-276x-6-206

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Magnetotransport in quantum cascade detectors: analyzing the current under illumination

Journal article published in 2011 by François-Régis Jasnot, Nicolas Péré-Laperne, Louis-Anne de Vaulchier, Francesca Carosella, Yves Guldner, Robson Ferreira, Amandine Buffaz, Laetitia Doyennette, Vincent Berger, Mathieu Carras, Xavier Marcadet
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractPhotocurrent measurements have been performed on a quantum cascade detector structure under strong magnetic field applied parallel to the growth axis. The photocurrent shows oscillations as a function of B. In order to describe that behavior, we have developed a rate equation model. The interpretation of the experimental data supports the idea that an elastic scattering contribution plays a central role in the behavior of those structures. We present a calculation of electron lifetime versus magnetic field which suggests that impurities scattering in the active region is the limiting factor. These experiments lead to a better understanding of these complex structures and give key parameters to optimize them further.