Internal Photo Effect from a Single Quantum Emitter

• URL: http://arxiv.org/abs/2010.10924v1
• Date: Wed, 21 Oct 2020 12:13:07 GMT
• Title: Internal Photo Effect from a Single Quantum Emitter
• Authors: Pia Lochner, Jens Kerski, Annika Kurzmann, Andreas D. Wieck, Arne Ludwig, Martin Geller, Axel Lorke
• Abstract summary: Internal photo-effect that emits electrons from the dot by an intra-band excitation is studied. We find a linear dependence of the optically generated emission rate on the intensity excitation. The results also quantify an important, but mostly neglected, mechanism that may fundamentally limit the coherence times in solid-state quantum optical devices.
• Score: 0.5172201569251683
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate by time-resolved resonance fluorescence measurements on a single self-assembled quantum dot an internal photo-effect that emits electrons from the dot by an intra-band excitation. We find a linear dependence of the optically generated emission rate on the excitation intensity and use a rate equation model to deduce the involved rates. The emission rate is tunable over several orders of magnitude by adjusting the excitation intensity. Our findings show that a process that is well known in single atom spectroscopy (i.e. photo ionization) can also be observed in the solid state. The results also quantify an important, but mostly neglected, mechanism that may fundamentally limit the coherence times in solid-state quantum optical devices.

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