arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.15219physics.opticscond-mat.mes-hallquant-ph
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原子薄等离子体纳米结构中的双光子自发发射

Two-photon spontaneous emission in atomically thin plasmonic nanostructures

Y. Muniz, A. Manjavacas, C. Farina, D. A. R. Dalvit, W. J. M. Kort-Kamp

摘要:

在少光子水平上利用光-物质相互作用的能力在量子技术中起着关键作用。单光子-光的最基本状态-可以在原子和固态发射器中按需产生。双光子态也是关键的量子资产,但在单个发射器中实现它们是具有挑战性的,因为它们的生成速率比竞争性的单光子过程慢得多。我们证明了原子薄的等离子体纳米结构可以利用双光子自发发射,从而产生巨大的远场双光子生产,丰富的共振模式,使定制的光子和等离子体纠缠态,等离子体辅助的单光子创建数量级比标准的单光子发射更有效。我们解开的双光子自发发射渠道,并显示其谱线的形状出现从一个复杂的相互作用之间的法诺和洛伦兹共振。二维纳米结构中增强的双光子自发发射为片上量子信息处理和自由空间量子通信开辟了另一种有效的光-物质纠缠源。

英文摘要:

The ability to harness light-matter interactions at the few-photon level plays a pivotal role in quantum technologies. Single photons - the most elementary states of light - can be generated on-demand in atomic and solid state emitters. Two-photon states are also key quantum assets, but achieving them in individual emitters is challenging because their generation rate is much slower than competing one-photon processes. We demonstrate that atomically thin plasmonic nanostructures can harness two-photon spontaneous emission, resulting in giant far-field two-photon production, a wealth of resonant modes enabling tailored photonic and plasmonic entangled states, and plasmon-assisted single-photon creation orders of magnitude more efficient than standard one-photon emission. We unravel the two-photon spontaneous emission channels and show that their spectral line-shapes emerge from an intricate interplay between Fano and Lorentzian resonances. Enhanced two-photon spontaneous emission in two-dimensional nanostructures paves the way to an alternative efficient source of light-matter entanglement for on-chip quantum information processing and free-space quantum communications.

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