Cavity-Enhanced Emission and Absorption of Color Centers in a Diamond Membrane With Selectable Strain
| Autor: | Berghaus, Robert, Sachero, Selene, Bayer, Gregor, Heupel, Julia, Herzig, Tobias, Feuchtmayr, Florian, Meijer, Jan, Popov, Cyril, Kubanek, Alexander |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Group IV color centers in diamond are among the most promising optically active spin systems with strong optical transitions and long spin coherences. The ground-state splitting of the center is particularly important to suppress the interaction with coherence-limiting phonons, which improves the coherence properties and sets the upper limit for the operating temperature. Negatively charged silicon-vacancy centers have an ordinary ground-state splitting of only 48GHz, resulting in required temperatures below one Kelvin, which can only be achieved by dilution refrigerators. Here, we increase the ground-state splitting by up to an order of magnitude by induced strain in a single-crystal diamond membrane. Furthermore, we demonstrate cavity-assisted spectroscopy enabled by coupling the emitter ensemble with a selectable strain to the mode of a Fabry-Perot microcavity. Calculation of the absorption cross-section yields $\sigma_{ens} = $4.9*10^-11 cm^2. Together with the Purcell-enhanced twofold reduction in emitter lifetime below 1ns, this makes the system a promising spin-photon interface at moderate temperatures of 4K. Comment: 12 pages, 9 figures |
| Databáze: | arXiv |
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