Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 46: Quantum dots and wires: Optical properties III
HL 46.8: Vortrag
Donnerstag, 15. März 2018, 17:00–17:15, A 151
Pure single-photon emission from InGaAs QDs in a tunable fiber-based external mirror microcavity — •Thomas Herzog1, Marc Sartison1, Sascha Kolatschek1, Stefan Hepp1, Alexander Bommer2, Christoph Pauly3, Frank Mücklich3, Christoph Becher2, Simone Luca Portalupi1, Michael Jetter1, 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 — 2Universität des Saarlandes, Fachrichtung 7.2 (Experimentalphysik), Campus E2.6, 66123 Saarbrücken, Germany — 3Lehrstuhl für Funktionswerkstoffe, Materialwissenschaft und Werkstofftechnik, 66123 Saarbrücken Germany
Cavity QED is extensively used in many solid-state systems in order to improve the quantum-emitter performances and accessing interesting physical regimes. It is essential that the cavity mode matches the emitter wavelength perfectly. In this work, we present an open fiber-based Fabry-Pérot cavity with a finesse of 140 coupled to single-photon emission by In(Ga)As quantum dots. We are able to match every emitter inside the cavity spatially and spectrally by precisely tuning the cavity in subnanometric resolution. Additionally, by using state-of-the-art photolithography we are able to deterministically relocate selected emitters. This allows comparing their behavior in resonance to the cavity and without any cavity effects. We find Purcell enhancement up to a factor of 4.5, while still having single-photon emission with a second-order correlation function limited only by the detector noise.