Freiburg 2024 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 55: Poster VI
Q 55.24: Poster
Thursday, March 14, 2024, 17:00–19:00, Tent B
Quantum photonics using color centers in a diamond membrane coupled to a photonic structure — •Surena Fatemi1,2, Aurélie Broussier2, Roy Konnoth Ancel2, Jan Fait3, Christophe Couteau2, and Christoph Becher1 — 1Fachrichtung Physik, Universität des Saarlandes, Campus E2.6, 66123, Saarbrücken, Germany — 2Light, nanomaterials, nanotechnologies (L2n), EMR CNRS 7004, Université de Technologie de Troyes (UTT) 12 rue Marie Curie, CS 42060, 10004 Troyes cedex, France. — 3FZU - Institute of Physics of the Czech Academy of Sciences, Prague
In recent years, color centers of wide band-gap materials have drawn a lot of attention due to their superior properties for quantum technologies. One of the most interesting color center systems are the group-IV color centers in diamond due to their long spin coherence times and excellent optical properties such as narrow optical emission lines, high spectral stability, and bright single-photon emission. However, one of the main obstacles for realization of a quantum device exploiting color centers is the lack of efficient out-coupling of photon emission from the diamond itself which leads to low photon rates. We consider a group-IV color center in a diamond membrane evanescently coupled to photonic waveguides such as Silicon-on-Insulator and Ion-Exchanged glass waveguides. We present design studies and simulations including the membrane geometry, coupling interface, and waveguide structures using Finite-Element-Method simulations and Monte-Carlo optimization to improve the out-coupling of the emission in order to achieve high photon rates.
Keywords: Color Centers; Single-Photon-Emitter; Ion-Exchanged Waveguide; coupled-mode-theory; Diamond