SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Quantum Technologies: Color Centers II (joint session Q/QI)
Q 21.8: Vortrag
Dienstag, 7. März 2023, 12:45–13:00, F442
Fabrication of suspended "Sawfish" photonic crystal cavities in diamond — •Tommaso Pregnolato1,2, Marco Stucki1,2, Julian Bopp1,2, Maarten van der Hoeven2, and Tim Schröder1,2 — 1Ferdinand-Braun-Institut gGmbH, Berlin, Germany — 2Department of Physics, Humboldt-Universität zu Berlin, Berlin, Germany
Color centers in diamond are a promising candidate for the development of quantum photonic applications: for example, their long spin-coherence times make them the optimal choice for building spin-based quantum networks [1]. Such networks will be formed by many nodes containing color centers that are all interconnected by photonic channels. An efficient interface between spin and photon is key for the success of such a system, as it enables the transfer of information from the stationary qubits (i.e. the spins) to the flying qubits (i.e. the propagating photons). Such interface can be achieved by coupling a defect center to a photonic crystal cavity [2]. Here, we report on our progress of fabricating such photonic crystal cavities, based on our recently proposed "sawfish" cavity design [3]. Our design is optimized for enhancing the interaction between tin-vacancy centers in diamonds and single-mode light fields. We present our fabrication procedure to obtain such suspended devices, our investigations on how different parameters affect the relevant etching rates and our first optical characterizations.
[1] M. Atatüre, et al., Nat. Rev. Mater. 3, 38-51 (2018) [2] T. Schröder, et al, J. Opt. Soc. Am. B 33, B65-B83 (2016) [3] J. Bopp, et al., arXiv:2210.04702 (2022)