论文标题
多原子光子界面中的微腔中的两个站立波重叠
Overlapping two standing-waves in a microcavity for a multi-atom photon interface
论文作者
论文摘要
我们开发了一个轻质的界面，可在冷原子链和光腔的光子之间实现强和均匀的耦合。该界面是一种纤维Fabry-Perot腔，对原子过渡的波长和几何相应的红色脱落的腔内诱捕晶格的偶然共振。满足强和均匀的原子 - 光子耦合的条件需要优化腔中两个站立波之间的空间重叠。在强耦合腔中，在模式腰部和雷利范围很小的情况下，我们会考虑到倍相相的最佳捕获波长的表达。控制驻波重叠的主要参数是两个波长之间的腔镜上反射处的相对相移，我们为此得出了最佳值。我们已经根据这些结果构建了一个微腔，采用了两个波长的定制反射镜，并采用了定制的镜子。我们提出了一种用高精度测量反射时相对相移的方法，这使我们能够确定该腔中两种模式的空间重叠。
We develop a light-matter interface enabling strong and uniform coupling between a chain of cold atoms and photons of an optical cavity. This interface is a fiber Fabry-Perot cavity, doubly resonant for both the wavelength of the atomic transition and for a geometrically commensurate red-detuned intracavity trapping lattice. Fulfilling the condition of a strong and uniform atom-photon coupling requires optimization of the spatial overlap between the two standing waves in the cavity. In a strong-coupling cavity, where the mode waists and Rayleigh range are small, we derive the expression of the optimal trapping wavelength taking into account the Gouy phase. The main parameter controlling the overlap of the standing waves is the relative phase shift at the reflection on the cavity mirrors between the two wavelengths, for which we derive the optimal value. We have built a microcavity optimized according to these results, employing custom-made mirrors with engineered reflection phase for both wavelengths. We present a method to measure with high precision the relative phase shift at reflection, which allows us to determine the spatial overlap of the two modes in this cavity.
