DataVXACS PhotonicsPaper
journal article·2024-06-19Open access

Precise Characterization of a Waveguide Fiber Interface in Silicon Carbide

Marcel Krumrein, Raphael Nold, Flavie Davidson-Marquis, Arthur Bouamra, Lukas Niechziol, Timo Steidl, Ruoming Peng, Jonathan Körber, Rainer Stöhr, Nils Gross, Jurgen H. Smet, Jawad Ul-Hassan, Péter Udvarhelyi, Adam Gali, Florian Kaiser, Jörg Wrachtrup

ACS Photonics· Volume 11· Issue 6
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Source abstract

Abstract

Spin-active optical emitters in silicon carbide are excellent candidates toward the development of scalable quantum technologies. However, efficient photon collection is challenged by undirected emission patterns from optical dipoles, as well as low total internal reflection angles due to the high refractive index of silicon carbide. Based on recent advances with emitters in silicon carbide waveguides, we now demonstrate a comprehensive study of nanophotonic waveguide-to-fiber interfaces in silicon carbide. We find that across a large range of fabrication parameters, our experimental collection efficiencies remain above 90%. Further, by integrating silicon vacancy color centers into these waveguides, we demonstrate an overall photon count rate of 181 kilo-counts per second, which is an order of magnitude higher compared to standard setups. We also quantify the shift of the ground state spin states due to strain fields, which can be introduced by waveguide fabrication techniques. Finally, we show coherent electron spin manipulation with waveguide-integrated emitters with state-of-the-art coherence times of T 2 ∼ 42 μs. The robustness of our methods is very promising for quantum networks based on multiple orchestrated emitters.
Source: openalex_inverted_index · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Diamond and Carbon-based Materials Research · Advanced Fiber Laser Technologies · Quantum and electron transport phenomena

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

3rd Institute of Physics, IQST, and Research Centre Scope

University of Stuttgart

Materials Research and Technology (MRT) Department

Luxembourg Institute of Science and Technology

Department of Physics and Materials Science

University of Luxembourg

Solid State Nanophysics

Max Planck Institute for Solid State Research

Department of Physics, Chemistry and Biology

Linköping University

Wigner Research Centre for Physics

Institute of Physics, Department of Atomic Physics

Budapest University of Technology and Economics

MTA-WFK Lendület “Momentum” Semiconductor Nanostructures Research Group

Funding

Bundesministerium f?r Bildung und Forschung · Vetenskapsr?det · HORIZON EUROPE European Innovation Council · Fonds National de la Recherche Luxembourg · National Research, Development and Innovation Office · Luxembourg Institute of Science and Technology · Deutsche Forschungsgemeinschaft · Knut och Alice Wallenbergs Stiftelse · H2020 Future and Emerging Technologies · Baden-W?rttemberg Stiftung · Horizon 2020 Framework Programme · Quantum Information National Laboratory · Korm?nyzati Informatikai Fejleszt?si ?gyn?ks?g

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