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Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 26: Quantum Dots and Wires 5: Optics 2

HL 26.2: Vortrag

Donnerstag, 8. September 2022, 09:45–10:00, H32

Temporal evolution of line broadening in charge controlled quantum dots — •Tim Strobel1, Jonas H. Weber1, Marcel Schmidt2, Lukas Wagner1, Andreas D. Wieck2, Michael Jetter1, Simone L. Portalupi1, Arne Ludwig2, and Peter Michler11Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany — 2Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, D-44780 Bochum, Germany

Self-assembled semiconductor quantum dots (QDs) present themselves as an attractive platform for the implementation of scalable hybrid quantum-information schemes. On-demand emission of high-quality single photons demonstrates the potential of such systems. Sources of noise, caused by the interaction with the solid-state environment can lead to an inhomogeneous broadening of the emission line. The magnitudes and timescales of such dephasing mechanisms vary strongly with the material composition and heterostructure of a sample. Here, we employ Photon-correlation Fourier spectroscopy as a powerful experimental method to study the spectral dynamics of single emitters, with high spectral and temporal resolution. In particular, the broadening mechanisms of QDs embedded in a novel type of gated structure, based on a n-i-n-diode are investigated.

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