Regensburg 2019 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 26: Focus Session: Quantum light sources for applications in quantum communication networks
HL 26.6: Invited Talk
Wednesday, April 3, 2019, 11:45–12:15, H34
Single Organic Molecules for Quantum Optics — •Ilja Gerhardt1,2, Mohammad Rezai1, and Jörg Wrachtrup1,2 — 1Institute for Quantum Science and Technology (IQST) and 3rd Institute of Physics, D-70569 Stuttgart, Germany — 2Max Planck Institute for Solid State Research, Heisenbergstr. 1, D-70569 Stuttgart, Germany
Single organic molecules at cryogenic conditions allow for the generation of narrow-band (14 MHz), and simultaneously high-flux single photons. In the last years, we managed to combine them with atomic vapors such that effects like slow light on the sodium D2-line (589 nm) could be observed [1]. Now we extend our experiments towards all-optical configurations and high-visibility Hong-Ou-Mandel interference [2]. This configuration is extended towards a “delayed-choice” quantum eraser and allows for the generation of degenerate entangled photon-pairs. The raw data violates Bell’s inequality with a Bell parameter of S=2.24 [3].
[1] – Molecular photons interfaced with alkali atoms, Petr Siyushev, Guilherme Stein, Jörg Wrachtrup, and Ilja Gerhardt, Nature, 509, 66-70 (2014);
[2] – Coherence Properties of Molecular Single Photons for Quantum Networks, Mohammad Rezai, Jörg Wrachtrup, and Ilja Gerhardt, Phys. Rev. X, 2018, 8, 9 (2018);
[3] – Polarization-entangled photon pairs from a single molecule, Mohammad Rezai, Jörg Wrachtrup, and Ilja Gerhardt, Optica, 6, 34-40 (2019);