Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 24: Poster Session II
HL 24.27: Poster
Tuesday, March 13, 2018, 18:30–20:30, Poster F
Optimization of cavity-enhanced single-photon generation from optical two-photon Raman processes in quantum dot systems — •Tom Praschan1, Dominik Breddermann1, Dirk Heinze1, Rolf Binder2, and Stefan Schumacher1,2 — 1Department of Physics and CeOPP, Paderborn University, Paderborn, Germany — 2College of Optical Sciences, University of Arizona, Tucson, Arizona, USA
We investigate cavity-enhanced single-photon emission from optical two-photon Raman transitions in quantum dot systems. For this emission process, it has been shown that basic properties such as frequency, linewidth and emission time of the emitted Raman photon are determined by the external control laser [1,2]. In this context, especially Λ-shaped systems, e.g. in quantum dots or atomic systems, have already been studied in great detail [3]. However, higher Raman photon output towards on-demand generation – which is crucial for quantum communication networks – has not been realized yet. We use numerical algorithms to design an optimized chirped laser pulse in order to achieve on-demand single photon emission. As an optimization criterion, here we use the Raman emission probability that can be defined based on the cluster-expansion approach [4].
[1] D. Heinze, D. Breddermann, et al., Nat. Commun. 6, 8473 (2015).
[2] D. Breddermann, D. Heinze, et al., Phys. Rev. B 94, 165310 (2016).
[3] T. M. Sweeney, S. G. Carter, et al., Nat. Photonics 8, 442 (2014).
[4] D. Breddermann, T. Praschan, et al., arXiv:1711.11490 (2017).