Maag, T. and Bayer, A. and Baierl, S. and Hohenleutner, M. and Korn, T. and Schueller, C. and Schuh, D. and Bougeard, D. and Lange, C. and Huber, R. and Mootz, M. and Sipe, J. E. and Koch, S. W. and Kira, M. (2016) Coherent cyclotron motion beyond Kohn's theorem. NATURE PHYSICS, 12 (2). 119-+. ISSN 1745-2473, 1745-2481
Full text not available from this repository. (Request a copy)Abstract
In solids, the high density of charged particles makes many-body interactions a pervasive principle governing optics and electronics(1-12). However, Walter Kohn found in 1961 that the cyclotron resonance of Landau-quantized electrons is independent of the seemingly inescapable Coulomb interaction between electrons(2). Although this surprising theorem has been exploited in sophisticated quantum phenomena(13-15), such as ultrastrong light-matter coupling(16), superradiance(17) and coherent control(18), the complete absence of nonlinearities excludes many intriguing possibilities, such as quantum-logic protocols(19). Here, we use intense terahertz pulses to drive the cyclotron response of a two-dimensional electron gas beyond the protective limits of Kohn's theorem. Anharmonic Landau ladder climbing and distinct terahertz four-and six-wave mixing signatures occur, which our theory links to dynamic Coulomb effects between electrons and the positively charged ion background. This new context for Kohn's theorem unveils previously inaccessible internal degrees of freedom of Landau electrons, opening up new realms of ultrafast quantum control for electrons.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SEMICONDUCTOR MAGNETO-PLASMA; ELECTRON-GAS; RESONANCE; LIGHT; GAAS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Rupert Huber Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group Christian Schüller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Mar 2019 09:30 |
| Last Modified: | 14 Mar 2019 09:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/2481 |
Actions (login required)
 |
View Item |
