Dresden 2020 – scientific programme

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 2: Focus: High-resolution Lithography and 3D Patterning (Part I) (joint session KFM/CPP/HL)

KFM 2.6: Talk

Monday, March 16, 2020, 11:50–12:10, TOE 317

Coupling Single Mode Fibers to Single Quantum Emitters using Femtosecond 3D Printing Technology — •Ksenia Weber¹, Simon Thiele², Simon Ristok¹, Sarah Fischbach³, Jan Hausen³, Lucas Bremer³, Mark Saritson⁴, Simone Protalupi⁴, Alois Herkommer², Stefan Reitzenstein³, Peter Michler⁴, and Harald Gießen¹ — ¹4th Physics Institute and Research Center SCoPE, University of Stuttgart, Stuttgart — ²Institute for Applied Optics and Research Center SCoPE, University of Stuttgart, Stuttgart — ³Institute of Solid State Physics, Technische Universität Berlin — ⁴Institut für Halbleiteroptik und Funktionelle Grenzflächen and Research Center SCoPE, University of Stuttgart

We propose a method to efficiently couple single photon quantum emitters to optical single mode fibers. Due to the undirected emission of single photon sources, such as quantum dots or defect centers in crystals, coupling into optical fibers which is essential for long range quantum communication is typically associated with high losses. To overcome this limitation, femtosecond two-photon lithography can be used to directly fabricate a combination of a microlens and an optical fiber holder onto a quantum emitter. A single mode optical fiber is then integrated into the fiber holder. Due to the high precision of the femtosecond 3D printing process, the position of the fiber core can be adjusted with sub-micrometer accuracy to match the focal point of the microlens. Light from the emitter which is focused by the microlens can therefore efficiently be coupled into the fiber. We present a number of different optical layouts and discuss their pros and cons.