Moldavskaya, M. D. and Golub, L. E. and Bel'kov, V. V. and Mikhailov, N. N. and Dvoretsky, S. A. and Weiss, Dieter and Ganichev, S. D. (2025) Bleaching of the terahertz magneto-photogalvanic effect in CdHgTe crystals with Kane fermions. JOURNAL OF APPLIED PHYSICS, 138 (3): 035702. ISSN 0021-8979, 1089-7550
Full text not available from this repository. (Request a copy)Abstract
We report the observation and comprehensive study of the complex nonlinear intensity dependence of the magneto-photogalvanic effect (MPGE) current induced by THz radiation in CdxHg1-XTe films with inverted ( x = 0.15 ) and noninverted ( x = 0.22 ) band structures. The nonlinearities are studied for the resonant MPGE caused by cyclotron resonance, interband transitions between Landau levels, and ionization impurities, as well as for nonresonant indirect Drude-like optical transitions. We show that all these processes lead to the saturation of the photocurrent caused by absorption bleaching. We develop a theoretical framework for each mechanism, which describes measured nonlinearities over an intensity range from 10 (- 3) to 4 x 10(4)W /cm (2) . Furthermore, we demonstrate that the saturation processes for these absorption channels differ significantly, allowing us to analyze them independently by considering different intensity regimes. The observed nonlinearities enable us to determine the energy relaxation times of Kane fermions excited by cyclotron resonance and interband optical transitions. (c) 2025 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license(https://creativecommons.org/licenses/by/4.0/).https://doi.org/10.1063/5.0272610
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SEMICONDUCTORS; ABSORPTION; HGTE |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Professor Ganichev > Group Sergey Ganichev Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 17 Jun 2026 08:48 |
| Last Modified: | 17 Jun 2026 08:48 |
| URI: | https://pred.uni-regensburg.de/id/eprint/66242 |
Actions (login required)
 |
View Item |
