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Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot

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arxiv 2011.10393 v2 pith:5MAL5ALP submitted 2020-11-20 cond-mat.mes-hall quant-ph

Femtosecond Transfer and Manipulation of Persistent Hot-Trion Coherence in a Single CdSe/ZnSe Quantum Dot

Philipp Henzler , Christian Traum , Matthias Holtkemper , David Nabben , Marcel Erbe , Doris E. Reiter , Tilmann Kuhn , Suddhassatta Mahapatra
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Karl Brunner Denis V. Seletskiy Alfred Leitenstorfer
This is my paper
classification cond-mat.mes-hall quant-ph
keywords quantumbeatscoherencep-shelltransmissiontrionabsorptionamplitude
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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.

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