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QI: Fachverband Quanteninformation
QI 28: Surface Atom and Color Center Spin Qubits
QI 28.3: Talk
Thursday, March 21, 2024, 15:45–16:00, HFT-FT 131
Demonstration of coherent excitation in a tin-vacancy color center in diamond with the SUPER scheme — •Cem Güney Torun1, Mustafa Gökçe1, Thomas K. Bracht2, Mariano Isaza Monsalve1, Sarah Benbouabdellah1, Özgün Ozan Nacitarhan1, Marco E. Stucki1,3, Gregor Pieplow1, Tommaso Pregnolato1,3, Joseph H.D. Munns1, Doris E. Reiter4, and Tim Schröder1,3 — 1Institute of Physics, Humboldt University of Berlin, Berlin, Germany — 2Institute of Solid State Theory, University of Münster, Münster, Germany — 3Ferdinand-Braun-Institute, Berlin, Germany — 4Faculty of Physics, Technical University Dortmund, Dortmund, Germany
We present a new approach to generate coherent single photons using a technique named SUPER (Swing-UP of the quantum EmitteR population) on a tin-vacancy color center in diamond. Traditional methods rely on resonant excitation but face a major challenge in separating the excitation laser from emitted photons due to spectral overlap. SUPER, however, employs two-color nonresonant pulses to achieve full inversion to the excited state allowing effective spectral filtering.
The implementation of SUPER involves a specially designed spectral pulse engineering setup. This setup generates pulses with specific spectral shapes directed to a tin-vacancy center within a diamond nanopillar. This study marks the first application of SUPER to a color center in diamond, demonstrating coherent single photon emission with nonresonant pulses. The results, consistent with theoretical models, show promise for the exploration of ultrafast processes using these methods.
Keywords: color centers in diamond; tin-vacancy; coherent control; SUPER scheme; pulsed excitation