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HL: Fachverband Halbleiterphysik

HL 35: HL Poster II

HL 35.73: Poster

Mittwoch, 3. April 2019, 17:30–20:00, Poster E

High-resolution measurement of quantum dot emission spectra after resonant excitation — •Tim Strobel, Stephan Simmler, Simon Kern, Jonas H. Weber, Hüseyin Vural, 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 information technologies rely on two-photon inteference (TPI) as their key building block. Actual quantum applications highly depend on the indistinguishability of single photons. In this respect single semiconductor quantum dots (QDs) are well-established quantum emitters of high interest. They can be used as on-demand single sources of indistinguishable photons. This property is inevitable to successfully carry out two-photon inteference (TPI) experiments with the perspective of scaling up the complexity. To reach high indistinguishability, Fourier-limited emission spectra are desired. However, dephasing such as charge and spin noise broaden the linewidth of such single photon emitters drastically. Therefore, it is crucial to have knowledge about the influence of these effects on the emission spectrum. Here, we present a monolithic Fabry-Pérot interferometer which can be used to capture high-resolution spectra of semiconductor quantum dots. The inteferometer has a resolution even below the bandwith of the single Fourier-limited photons.