Terahertz Coherent Control of a Landau-Quantized Two-Dimensional Electron Gas
| Autor: | Arikawa, T., Wang, X., Hilton, D. J., Reno, J. L., Pan, W., Kono, J. |
|---|---|
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Physical Review B 84, 241307(R) (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.84.241307 |
| Popis: | We demonstrate coherent control of cyclotron resonance (CR) in a two-dimensional electron gas (2DEG). We use a sequence of terahertz pulses to control the amplitude of CR oscillations in an arbitrary fashion via phase-dependent coherent interactions. We observe a self-interaction effect, where the 2DEG interacts with the terahertz field emitted by itself within the decoherence time, resulting in a revival and collapse of quantum coherence. These observations are accurately describable using {\em single-particle} optical Bloch equations, showing no signatures of electron-electron interactions, which verifies the validity of Kohn's theorem for CR in the coherent regime. Comment: 4 pages, 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|