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HL: Fachverband Halbleiterphysik

HL 33: Poster Session III

HL 33.18: Poster

Mittwoch, 14. März 2018, 17:30–19:30, Poster F

Single Quantum Dot with Microlens and 3D-Printed Microobjective as Integrated Bright Single-Photon Source — •Jan Hausen1, Sarah Fischbach1, Timo Gissibl2, Simon Ristok2, Ksenia Weber2, Simon Thiele3, Tobias Heindel1, Sven Rodt1, Alois Herkommer3, Harald Giessen2, and Stephan Reitzenstein11Institute of Solid State Physics, Technische Universität Berlin, Berlin, Germany — 24th Physics Institute and Research Center SCoPE, Stuttgart, Germany — 3Institute for Applied Optics and Research Center SCoPE, Stuttgart, Germany

In recent years, semiconductor quantum dots (QD) have proven to work as close to ideal single-photon sources. In order to apply such sources in future quantum communication systems, it will be crucial to further increase the photon-extraction efficiency. Here we report on deterministically fabricated QD-microlenses combined with 3D printed microobjectives (MO). Monolithic microlenses were fabricated in a deterministic way by in-situ electron beam lithography allowing for spacial and spectral pre-selection of suitable QDs. Two-photon 3D direct laser writing enabled the realization of multilens MOs precisely aligned to the brightest microlens structures. A micro photoluminescence characterisation of the resulting combination shows an enhancement of the photon-extraction efficiency by a factor of two. The device also exhibits a high suppression of multiphoton events with g(2)(τ = 0)<0.02.

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DPG-Physik > DPG-Verhandlungen > 2018 > Berlin