Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot
Ultrafast transmission changes around the fundamental trion resonance are studied after exciting a p-shell exciton in a negatively charged II-VI quantum dot. The biexcitonic induced absorption reveals quantum beats between hot trion states at 133 GHz. While interband dephasing is dominated by relaxa...
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| creator | Henzler, Philipp Traum, Christian Holtkemper, Matthias Nabben, David Erbe, Marcel Reiter, Doris E Kuhn, Tilmann Mahapatra, Suddhassatta Brunner, Karl Seletskiy, Denis V Leitenstorfer, Alfred |
| description | Ultrafast transmission changes around the fundamental trion resonance are studied after exciting a p-shell exciton in a negatively charged II-VI quantum dot. The biexcitonic induced absorption reveals quantum beats between hot trion states at 133 GHz. While interband dephasing is dominated by relaxation of the P-shell hole within 390 fs, trionic coherence remains stored in the spin system for 85 ps due to Pauli blocking of the triplet electron. The complex spectro-temporal evolution of transmission is explained analytically by solving the Maxwell-Liouville equations. Pump and probe polarizations provide full control over amplitude and phase of the quantum beats. |
| doi_str_mv | 10.48550/arxiv.2011.10393 |
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| subjects | Coherence Excitons Liouville equations Physics - Mesoscale and Nanoscale Physics Physics - Quantum Physics Quantum dots Trions |
| title | Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot |
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