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HL: Fachverband Halbleiterphysik

HL 13: Poster Session III

HL 13.7: Poster

Tuesday, September 28, 2021, 13:30–16:30, P

Fiber-pigtailing quantum-dot cavity-enhanced light emitting diodes — Lucas Rickert¹, •Frederik Schröder¹, Timm Gao¹, Christian Schneider^{2, 3}, Sven Höfling², and Tobias Heindel¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — ²Technische Physik, Physikalisches Institut, Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Würzburg, Germany — ³Institut für Physik, Carl von Ossietzky Universität Oldenburg, Oldenburg, Germany

Semiconductor quantum dots embedded in engineered microcavities are considered key building blocks for photonic quantum technologies [1]. The direct fiber-coupling of respective devices would thereby offer many advantages for practical applications [2]. Here, we present a method for the direct and permanent coupling of electrically operated quantum-dot micropillar-cavities to single-mode fibers [3]. The fiber-coupling technique is based on a robust four-step process fully carried out at room temperature, which allows for the deterministic coupling of a selected target device. Using the cavity mode electroluminescence as feedback parameter, precise fiber-to-pillar alignment is maintained during the whole process. Permanent coupling is achieved in the last process step using UV curing of optical adhesive. Our results are an important step towards the realization of plug-and-play benchtop electrically-driven single-photon sources.

[1] T. Heindel et al., Appl. Phys. Lett. 96, 011107 (2010)

[2] T. Kupko et al., arXiv.2105.03473 (2021)

[3] L. Rickert et al., arXiv.2102.12836 (2021)