Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 46: Nano-Optics (Single Quantum Emitters) II

Q 46.6: Vortrag

Donnerstag, 12. März 2020, 15:15–15:30, a310

Optimal Photonic Crystal Cavities for Coupling Nanoemitters to Photonic Integrated Circuits — •Jan Olthaus1, Philip P. J. Schrinner2, Carsten Schuck2, and Doris E. Reiter11Institute of Solid State Theory, University of Muenster — 2Physics Institute, University of Muenster

Photonic integrated circuits hold great promise for realizing scalable quantum technologies. On-chip implementation of those circuits requires an efficient interface between quantum emitters and nanophotonic devices. Such an interface can be provided using photonic crystal nanobeam cavities, which combine wavelength-scale mode volumes with high quality factors.

We show that the design and fabrication of photonic crystal nanobeam cavities in the visible wavelength regime is possible directly on-substrate. Our cavities are designed to host NV-centers in nanodiamonds. We stress that the on-substrate design allows compatibility with modern fabrication processes. Three different cavity geometries based on a mode-matching and a deterministic design approach are optimised using 3D-FDTD simulations. Here, we present the optimization strategies and the resulting parameters. Using the optimized parameters, we verify the theoretical predictions experimentally, finding a reasonable agreement. In our case the mode-matching approach is found advantageous for on-substrate realizations.

Our results pave the way for integrating quantum emitters with nanophotonic circuits for applications in quantum technologies.

[1] Adv. Quantum Technol. 1900084 (2019).

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