Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 51: Focus Session: Hybrid Quantum-Dot / Atom Systems
HL 51.6: Hauptvortrag
Mittwoch, 22. März 2017, 11:45–12:15, POT 112
Atomic-vapor-enabled variable optical delay for triggered single-photons from a semiconductor quantum dot — •Hüseyin Vural1, Jonas Weber1, Markus Müller1, Simon Kern1, Julian Maisch1, Matthias Widmann2, Robert Löw3, Jörg Wrachtrup2, Ilja Gerhardt2, Simone Portalupi1, Michael Jetter1, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany — 23. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart — 35. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart
Beside their enormous flux, quantum dots (QDs) allow for high photon indistinguishability and photonic entanglement generation, and their use as flying qubits for the quantum communication of the future. One limitation of QDs is the missing long lasting quantum memory. Here, we focus on the approach of storing light in an cesium (Cs)-vapor by slowing down single photons. High dispersion between ground-state hyperfine resonances of Cs-vapors enables lower group velocities, while maintaining transmission. Using a Cs-vapor as slow light-medium, we present a variable delay up to several ns for photons from resonantly excited QD's. Increasing the temperature in the vapor changes the dispersion, which allows us to control the amount of delay experienced by the photons. Eventually we investigate and compare the single-photon emission and two-photon interference of delayed and undelayed photons.