Regensburg 2019 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 26: Focus Session: Quantum light sources for applications in quantum communication networks

HL 26.1: Hauptvortrag

Mittwoch, 3. April 2019, 09:30–10:00, H34

GaAs quantum dots as tunable sources of entangled and indistinguishable photons — •Armando Rastelli — Institut für Halbleiter und Festkörperphysik, Johannes Kepler Universität Linz, Österreich

Among different solid-state emitters of quantum light, epitaxial GaAs quantum dots (QDs) have recently emerged as nearly-ideal sources of triggered polarization entangled photon pairs [1]. This property, combined with the strongly suppressed probability of multiphoton emission [2] has allowed the implementation of quantum teleportation using photons subsequently emitted by a single QD [3].

In this talk I will discuss the peculiar properties of GaAs QDs, their performance as emitters of both single and entangled photons, as well as possible methods to engineer their light emission characteristics [1,4] to meet the demanding requirements imposed by photonic quantum technologies.

[1] D. Huber et al. Phys. Rev. Lett. 121, 033902 (2018).

[2] L. Schweickert et al. Appl. Phys. Lett. 112, 093106 (2018).

[3] M. Reindl et al. Science Adv. (2018).

[4] X. Yuan et al. Nat. Comm. 9, 3058 (2018).