金属微纳结构操控单光子发射体辐射

Tailoring single-photon emission with metallic nano-structures

固态单光子发射体结合了原子优异的光学性质(如高可靠性、高效率等)和固态系统的便利性与可扩展性,在可扩展光量子信息技术中扮演着重要角色。然而,真空中固态单光子发射体所发出的单光子具有自发辐射速率低、各向同性发射、发射光的偏振状态随机等不足,这极大地限制了其应用。金属微纳结构支持的表面等离激元具有巨大的场增强和亚波长的场束缚效应,因此国内外研究者设计了各种各样的金属微纳结构来操控单光子发射体的辐射。本研究综述了金属微纳结构在单光子发射体自发辐射增强、准直辐射、辐射偏振操控等方面的研究进展,重点比较了性能指标并分析了操控机制。最后,对金属微纳结构操控单光子发射体辐射的挑战和发展进行了展望。

Solid-state single-photon emitters have advantages of the outstanding optical properties of atoms(such as high reliability and high efficiency)and the convenience and extensibility of solid-state systems.Therefore,they play an important role in scalable optical quantum information technology.However,single photons emitted from solid-state single-photon sources in vacuum have some drawbacks,such as low spontaneous radiation rate,omnidirectional emission,and random polarization state of emission light,which greatly limit their applications.Surface plasmon polaritons supported by metallic micro-nano structures have huge field enhancement and sub-wavelength field confinement effects.Therefore,a variety of metallic micro-nano structures have been designed to manipulate single-photon emission.Here,recent advances in exploiting metallic micro-nano structures for tailoring single-photon emission(including emission enhancement,emission direction,and emission polarization)are reviewed.The performances of different manipulations of single-photon emission are compared and the corresponding control mechanisms are analyzed.Finally,the challenges and developments of the manipulation of single-photon emission from metallic micro-nano structures are prospected.