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Q: Fachverband Quantenoptik und Photonik
Q 66: Poster – Quantum Technologies III
Q 66.20: Poster
Donnerstag, 5. März 2026, 17:00–19:00, Philo 2. OG
Towards notch-filtered adiabatic rapid passage non-resonant coherent excitation scheme in vacancy centres in diamond — •Leon Reichgardt1, Cem Güney Torun1, and Tim Schröder1,2 — 1Department of Physics, Humboldt-Universität zu Berlin, 12489 Berlin, Germany — 2Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, 12489 Berlin, Germany
Group-IV color centers in diamond have emerged in the past decade as a hardware so- lution for quantum repeaters to transmit quantum information over long distances. One of the key required ingredients is the generation of on-demand indistinguishable single photons. When using optical resonant excitation, one of the challenges faced is that the photons used for excitation cannot be distinguished from the photons emitted by the color center. We report on the experimental implementation of the off-resonant excitation scheme, notch-filtered adiabatic rapid passage (NARP), in the SnV center. The scheme is based on an up-chirped pulse with a notch-filtered spectral component overlapping with the targeted resonance frequency. For the collection of the single photons, the scattered excitation pulse is suppressed using a bandpass filter. This excitation scheme is suitable for emitters in a cavity with a large Purcell factor and short lifetimes due to the broadband nature of the laser pulse. Applying NARP to SnV centers introduces a novel excitation technique from the ex- tended toolbox of quantum optics to diamond color centers..
Keywords: Color Centers; non-resonant coherent excitation; Broadband Pulse; Single Photons