High-frequency impact ionization and nonlinearity of photocurrent induced by intense terahertz radiation in HgTe-based quantum well structures

URN to cite this document:: urn:nbn:de:bvb:355-epub-405405
DOI to cite this document:: 10.5283/epub.40540

Hubmann, S. ; Gebert, S. ; Budkin, G. V.

; Bel'kov, V. V. ; Ivchenko, E. L. ; Dmitriev, A. P. ; Baumann, S. ; Otteneder, M. ; Ziegler, J. ; Disterheft, D. ; Kozlov, D. A. ; Mikhailov, N. N. ; Dvoretsky, S. A. ; Kvon, Z. D. ; Weiss, Dieter ; Ganichev, S. D.

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Date of publication of this fulltext: 18 Jul 2019 13:34

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Abstract

We report on a strong nonlinear behavior of the photogalvanics and photoconductivity under excitation of HgTe quantum wells (QWs) by intense terahertz (THz) radiation. The increasing radiation intensity causes an inversion of the sign of the photocurrent and transition to its superlinear dependence on the intensity. The photoconductivity also shows a superlinear raise with the intensity. We show ...