Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 34: Focus Session: Quantum Emission from Chaotic Microcavities (joint session HL/DY)

HL 34.2: Hauptvortrag

Mittwoch, 19. März 2025, 10:00–10:30, H17

Positioning of microcavities around single emitters — •Tobias Huber-Loyola — Technische Physik, Physikalisches Institut, Julius-Maximilians-Universität Würzburg, 97074 Würzburg, Germany

Single emitters in solids are great sources of single and entangled photons for usage in quantum information technologies. Many emitters possess high internal quantum efficiency, majority of the emission into the zero-phonon line and controllable single charge spins that can be used as quantum memories or as resource to generate chains of entangled photons. However, due to their solid-state host, which usually comes with a high refractive index, the outcoupling of photons requires the use of nanophotonic structures such as waveguides or microcavities. In this talk, I will show how we place microcavities around pre-registered quantum dots using hyperspectral imaging and e-beam lithography and I will give an overview of how placement accuracy has different effects on the emitted photons` properties based on the type of cavity.

Keywords: Quantum Dots; Microcavities; Micropillar; Circular Bragg Grating Resonator