Dresden 2020 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 64: Poster II

HL 64.42: Poster

Donnerstag, 19. März 2020, 10:00–13:00, P1A

Influence of electric and magnetic fields on the line broadening of semiconductor quantum dots — •Tim Strobel, Jonas H. Weber, Hüseyin Vural, Julian Maisch, Simone L. Portalupi, and Peter Michler — Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany

Photonic quantum technologies, such as quantum networks and quantum computing are based on two-photon interference (TPI). Implementations of actual TPI experiments inevitably require single photons with high indistinguishability. Semiconductor quantum dots (QDs) are an excellent choice with respect to such quantum applications. They can be used for on-demand emission of indistinguishable photons, a property, which is inevitable to successfully implement two-photon inteference experiments with up-scaled complexity using multiple sources. QD emission spectra with a linewidth reaching the transform limit are desired to yield maximum indistinguishability of photons from remote sources. Charge and spin noise, inherent to the semiconductor device, can drastically increase the linewidth to a multiple of the transform limit. Those two sources of noise are subject of current research and scientific discussion. Optimizing the perfomance demands an understanding of the noise sources. Here, we present an investigation on the influence of electric and magnetic fields on the QD emission linewidth. In this talk, measurement techniques to uncover the behaviour of those effects will be presented.