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HL: Fachverband Halbleiterphysik
HL 71: Focus Session: Tailored Nonlinear Photonics II
HL 71.3: Vortrag
Donnerstag, 19. März 2020, 16:00–16:15, POT 51
Optimizing the single-photon emission from a quantum-dot biexciton based on a direct two-photon transition — Tom Praschan1, •Dirk Heinze1, Artur Zrenner1, Andrea Walther2, and Stefan Schumacher1,3 — 1Department of Physics and Center for Optoelectronics and Photonics Paderborn (CeOPP), Paderborn University, Warburger Strasse 100, 33098 Paderborn, Germany — 2Department of Mathematics, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany — 3College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA
Semiconductor quantum dots are excellent candidates for on-demand single photon sources. A partly stimulated party spontaneous two-photon process from the biexciton state to the ground state of the quantum dot makes it possible to tailor the properties of the emitted single photon all-optically with a laser pulse [1,2]. An optimized and complex control pulse can steer the emission process into the desired emission path [3]. Here, we optimize the pulse parameters numerically to trigger the direct two-photon process with its maximum emission probability. We include phonon assisted processes [4] near the quantum dot resonances into our theoretical analysis and calculate single photon properties. Considering an emission into a high-Q cavity we find that on-demand single photon emission is possible for realistic parameters. [1] D. Heinze et al. Nat. Commun. 6, 8473 (2015). [2] D. Breddermann et al. Phys. Rev. B 94, 165310 (2016). [3] D. Breddermann et al. Phys. Rev. B, 97,125303 (2018). [4] D. Heinze et al. Phys. Rev. B, 95, 245306 (2017).