Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 53: Poster II
HL 53.22: Poster
Mittwoch, 9. März 2016, 09:30–13:30, Poster A
Semiconductor quantum dots interfaced with cesium: Mollow triplet and a Faraday filter — •Simone L. Portalupi1, Matthias Widmann2, Cornelius Nawrath1, Sang-Yun Lee2, Michael Jetter1, Joerg Wrachtrup2, Ilja Gerhardt2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, University of Stuttgart, Germany — 23. Institute of Physics, University of Stuttgart, Germany
Quantum dots (QDs) are nowadays the brightest source of single photons, allowing for high indistinguishability, photonic entanglement generation, and their use as "flying qubits" for quantum communication. A long lasting quantum memory could be realized using the highly coherent properties of atoms. Quantum hybrid systems, which realize spectral superposition of QDs and atoms, have been recently attracting a lot of attention. Atomic vapors have shown their potential in efficient filtering, based on the Faraday rotation. The so called "Faraday anomalous dispersion optical filter" is realized placing an atomic vapor cell in a magnetic field and between two crossed polarizers. It displays the complete rejection of the optical spectrum, except for wavelengths close and on the atomic transitions. Transmission efficiency close to unity makes them ideal filters for practical applications. Here we present the filtering of QDs emission in the vicinity of the Cs D1 line. The QD is resonantly driven in the so called dressed state regime, resulting in the Mollow triplet spectrum. The spectrum can be tuned to have both sidebands resonant with the atomic filter, and hence transmitted, while the Rayleigh peak as well as the scattered laser, is strongly suppressed.