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HL: Fachverband Halbleiterphysik
HL 24: Poster Session II
HL 24.32: Poster
Dienstag, 13. März 2018, 18:30–20:30, Poster F
Coherence and Population Dynamics of Excitons in Single Quantum Dots Revealed by Four-Wave Mixing Micro-Spectroscopy — •Daniel Wigger1, Tilmann Kuhn1, and Jacek Kasprzak2,3 — 1Institut für Festkörpertheorie, Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster — 2Univ. Grenoble Alpes, F-38000 Grenoble, France — 3CNRS, Institut Néel, "Nanophysique et Semiconducteurs" Group, F-38000 Grenoble, France
Four-Wave Mixing (FWM) micro-spectroscopy is a powerful tool to investigate the level structure and coupling mechanisms of single few-level systems. This knowledge is essential for the use of single emitters in quantum technology. We investigate single self-assembled quantum dots (QDs), which stand out as scalable solid state single emitters. By using two and three exciting pulses, we have access to the dynamics of the microscopic exciton coherences and populations, respectively [1]. We present combined theoretical and experimental studies on the dynamics of FWM signals and discuss the influence of laser intensities [2] and the coupling to phonons [3].
[1] Q. Mermillod et al., Optica 3, 377 (2016)
[2] D. Wigger et al., Phys. Rev. B 96, 165311 (2017)
[3] T. Jakubczyk et al., ACS Photonics 3, 2461 (2016)