Arjona Martínez Jesús, Parker Ryan A, Chen Kevin C, Purser Carola M, Li Linsen, Michaels Cathryn P, Stramma Alexander M, Debroux Romain, Harris Isaac B, Hayhurst Appel Martin, Nichols Eleanor C, Trusheim Matthew E, Gangloff Dorian A, Englund Dirk, Atatüre Mete
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Phys Rev Lett. 2022 Oct 21;129(17):173603. doi: 10.1103/PhysRevLett.129.173603.
Tin-vacancy centers in diamond are promising spin-photon interfaces owing to their high quantum efficiency, large Debye-Waller factor, and compatibility with photonic nanostructuring. Benchmarking their single-photon indistinguishability is a key challenge for future applications. Here, we report the generation of single photons with 99.7_{-2.5}^{+0.3}% purity and 63(9)% indistinguishability from a resonantly excited tin-vacancy center in a single-mode waveguide. We obtain quantum control of the optical transition with 1.71(1)-ns-long π pulses of 77.1(8)% fidelity and show it is spectrally stable over 100 ms. A modest Purcell enhancement factor of 12 would enhance the indistinguishability to 95%.
由于具有高量子效率、大德拜 - 瓦勒因子以及与光子纳米结构的兼容性，金刚石中的锡空位中心是很有前景的自旋 - 光子界面。对其单光子不可区分性进行基准测试是未来应用面临的关键挑战。在此，我们报告了从单模波导中一个共振激发的锡空位中心产生纯度为99.7_{-2.5}^{+0.3}%且不可区分性为63(9)%的单光子。我们通过保真度为77.1(8)%、持续时间为1.71(1)纳秒的π脉冲实现了对光学跃迁的量子控制，并表明其在100毫秒内光谱稳定。适度的珀塞尔增强因子12将使不可区分性提高到95%。
