论文标题
非对称梳子波导，用于原子与光之间的强相互作用
Asymmetric comb waveguide for strong interactions between atoms and light
论文作者
论文摘要
量子发射器和纳米结构的耦合，特别是冷原子和波导，最近由于工程光 - 物质相互作用前所未有的可能性，引起了人们的极大兴趣。但是，这些有前途的概念的实施受到各种理论和实验性问题的阻碍。在这项工作中，我们提出了一种新型的周期性介电波导，该波导在原子和引导光子之间提供了异常分散的强烈相互作用。我们设计了一个不对称的梳子波导，该波导支持与四分之一（代替二次）分散的缓慢模式，并且电场延伸到空气覆层中，以与原子进行最佳相互作用。我们计算以从原子过渡引起的频率下形成的两个引导模式形成的光学诱捕势。我们表明，冷rubium原子可以在1.3-mk深势孔中与结构近100 nm捕获。对于被困在该位置的原子，将发射到引导光子的发射基本上受到青睐，β因子高达0.88，辐射衰减速率高于慢速模式，比自由空间衰减速率大10倍。
Coupling quantum emitters and nanostructures, in particular cold atoms and waveguides, has recently raised a large interest due to unprecedented possibilities of engineering light-matter interactions. However, the implementation of these promising concepts has been hampered by various theoretical and experimental issues. In this work, we propose a new type of periodic dielectric waveguide that provides strong interactions between atoms and guided photons with an unusual dispersion. We design an asymmetric comb waveguide that supports a slow mode with a quartic (instead of quadratic) dispersion and an electric field that extends far into the air cladding for an optimal interaction with atoms. We compute the optical trapping potential formed with two guided modes at frequencies detuned from the atomic transition. We show that cold Rubidium atoms can be trapped as close as 100 nm from the structure in a 1.3-mK-deep potential well. For atoms trapped at this position, the emission into guided photons is largely favored, with a beta factor as high as 0.88 and a radiative decay rate into the slow mode 10 times larger than the free-space decay rate.
