Demonstrating the decoupling regime of the electron-phonon interaction in a quantum dot using chirped optical excitation
| Autor: | Kaldewey, Timo, Lüker, Sebastian, Kuhlmann, Andreas V., Valentin, Sascha R., Chauveau, Jean-Michel, Ludwig, Arne, Wieck, Andreas D., Reiter, Doris E., Kuhn, Tilmann, Warburton, Richard J. |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 95, 241306 (2017) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.95.241306 |
| Popis: | Excitation of a semiconductor quantum dot with a chirped laser pulse allows excitons to be created by rapid adiabatic passage. In quantum dots this process can be greatly hindered by the coupling to phonons. Here we add a high chirp rate to ultra-short laser pulses and use these pulses to excite a single quantum dot. We demonstrate that we enter a regime where the exciton-phonon coupling is effective for small pulse areas, while for higher pulse areas a decoupling of the exciton from the phonons occurs. We thus discover a reappearance of rapid adiabatic passage, in analogy to the predicted reappearance of Rabi rotations at high pulse areas. The measured results are in good agreement with theoretical calculations. Comment: Main manuscript 5 pages and 4 figures, Supplementary Information 5 pages and 3 figures, submitted to PRL |
| Databáze: | arXiv |
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