3D printed micro-optics for quantum technology: Optimised coupling of single quantum dot emission into a single-mode fibre

• DOI: 10.37188/lam.2021.006
• Publication Date: 2021-02-05T05:38:17Z
• Authors: Marc Sartison; Ksenia Weber; Simon Thiele; Lucas Bremer; Sarah Fischbach; Thomas Herzog; Sascha Kolatschek; Michael Jetter; Stephan Reitzenstein; Alois Herkommer; Peter Michler; Simone Luca Porta...; Harald Giessen
• Keywords: 600; 530

Future quantum technology relies crucially on building networks with high fidelity. To achieve this challenging goal, it is of utmost importance to connect individual systems such that their emitted single photons overlap the highest possible degree coherence. This requires perfect mode light from different emitters, which necessitates use single-mode fibres. Here, we present an advanced manufacturing approach accomplish task. We combined 3D printed complex micro-optics, as hemispherical and Weierstrass solid immersion lenses, well total internal reflection top indium arsenide dots optics fibres compared key features. observed a systematic increase in collection efficiency under variations lens geometry roughly 2 for hemispheric lenses up maximum greater than 9 geometry. Furthermore, temperature-induced stress was estimated these particular dimensions results be approximately 5 meV. Interestingly, further increased localisation accuracy emitters less 1 nm when acquiring micro-photoluminescence maps. show single-photon character source preserved after device fabrication, reaching $ g^{(2)} (0)$ value 0.19 pulsed optical excitation. The can joined fibre permanently fixed.This integrated system cooled by dipping into liquid helium using Stirling cryocooler or closed-cycle cryostat without necessity windows, all access through fibre. identify ideal designs experiments demonstrate excellent high-rate emission.