Regensburg 2019 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 47: Quantum dots and wires: Optical properties II
HL 47.1: Vortrag
Freitag, 5. April 2019, 09:30–09:45, H34
Investigation of spectral diffusion by slow-light photon correlation — •Julian Maisch1, Hüseyin Vural1, Simon Kern1, Jonas H. Weber1, Jörg Wrachtrup2, Ilja Gerhardt2, Michael Jetter1, Simone L. Portalupi1, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Center for Integrated Quantum Science and Technology (IQST) and SCoPE, University of Stuttgart, Allmandring 3, 70569 Stuttgart, Germany — 23. Institute of Physics, University of Stuttgart, IQST and SCoPE
Highly complex quantum applications require single coherent photons. One promising type of sources are semiconductor quantum dots (QDs). Due to the fact that they are embedded in a solid-state matrix, the emission is generally influenced by the environment e.g. fluctuating electrical and magnetic fields. These fluctuations cause random shifts of the emission frequency resulting in a broadened spectrum.
This so-called spectral diffusion is well known. Still, the charactersitic time scales are of interest. This talk presents a method to use a slow-light medium (here: cesium vapor) to make the effect of spectral wandering visible in a typical second-order correlation measurement. The dispersion of the atomic medium transfers spectral differences into the time signal of the photons. Therefore, the correlation reveals diffusion dynamics. Both experimental and supporting simulation results are presented.