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HL: Fachverband Halbleiterphysik

HL 26: Quantum Dots and Wires 5: Optics 2

HL 26.2: Talk

Thursday, September 8, 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 Michler¹ — ¹Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Science and Technology (IQ^ST) 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.