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HL: Fachverband Halbleiterphysik

HL 39: Materials and devices for quantum technology II

HL 39.3: Vortrag

Mittwoch, 18. März 2020, 10:15–10:30, POT 112

Efficient single photon extraction out of a photonic beer-glass — •Jonathan Jurkat¹, Magda Moczała-Dusanowska¹, Ana Predojevic², Niels Gregersen³, Christian Schneider¹, and Sven Höfling¹ — ¹Technische Physik, Julius-Maximilians Universität Würzburg, 97074 Würzburg — ²department of Physics, Stockholm University, 106 91 Stockholm — ³Department of Photonics Engeneering, Technical University of Denmark, 2800 Kgs. Lyngby

We demonstrate the fabrication and functionality of a photonic beer-glass cavity. This device combines the Purcell enhancement of a photonic micro-pillar structure with broadband photonic mode shaping of a vertical, tapered waveguide (sometimes referred to as a photonic trumpet). Our device is based on a MBE grown GaAs/AlGaAs heterostructure containing a low density layer of InAs Quantum Dots. Carefull optimization of the subsequent reactive ion etching step allows us to implement beer-glass shaped photonic microcavities, which support broadband optical resonances and promise efficient photon extraction efficiencies and significant Purcell effects over a spectral range up to 11 nm.