Regensburg 2019 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 35: HL Poster II
HL 35.46: Poster
Wednesday, April 3, 2019, 17:30–20:00, Poster E
Improving the Purcell-enhancement for InAs-QDs in Fabry-Perot fiber-microcavities — •Martin Fischer1, Thomas Herzog1, Sascha Böhrkircher2, Steffen Both2, Michael Jetter1, Simone Luca Portalupi1, Thomas Weiss2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen (IHFG), Center for Integrated Quantum Science and Technology (IQST ) and SCoPE, University of Stuttgart, D-70569 Stuttgart, Germany — 24th Physics Institute and Research Center SCoPE, University of Stuttgart, 70550, Stuttgart, Germany
Cavity quantum electrodynamics (cQED) deliver basic insight into fundamental principles of quantum-mechanics and its captivating nature. One specific phenomenon, for instance, can be the enhancement of a quantum system’s spontaneous emission rate, the so-called Purcell effect. Recent studies of QDs in a Fabry-Perot-based fiber microcavity already presented clear Purcell enhancement of the investigated transitions[1]. Here scattering losses and cavity-to-fiber mode mismatching limit the full exploitation of the setup’s potential.
We consequently present theoretical approaches which are leading to an optimized experimental setup.
We apply finite element methods (FEM) and mode-mixing in paraxial approximation to numerically determine the cavity modes. Furthermore, we investigate the influence of the curvature on the fiber in-coupling efficiency, hence paving the way for the pursuit of higher Purcell-enhancements.
[1] T. Herzog et al. , Quantum Sci. Technol. 3 (2018) 034009