Cavity-assisted resonance fluorescence from a nitrogen-vacancy center in diamond
arxiv(2024)
摘要
The nitrogen-vacancy center in diamond, owing to its optically addressable
and long-lived electronic spin, is an attractive resource for the generation of
remote entangled states. However, the center's low native fraction of coherent
photon emission, ∼3%, strongly reduces the achievable spin-photon
entanglement rates. Here, we couple a nitrogen-vacancy center with a narrow
extrinsically broadened linewidth ([159]MHz), hosted in a micron-thin
membrane, to the mode of an open optical microcavity. The resulting Purcell
factor of ∼1.8 increases the fraction of zero-phonon line photons to above
44%, leading to coherent photon emission rates exceeding four times the state
of the art under non-resonant excitation. Bolstered by the enhancement provided
by the cavity, we for the first time measure resonance fluorescence without any
temporal filtering with >10 signal-to-laser background ratio. Our microcavity
platform would increase spin-spin entanglement success probabilities by more
than an order of magnitude compared to existing implementations. Selective
enhancement of the center's zero-phonon transitions could furthermore unlock
efficient application of quantum optics techniques such as wave-packet shaping
or all-optical spin manipulation.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要