用于离子原子级分辨成像的双色紫外探测系统
Bichromatic UV detection system for atomically-resolved imaging of ions
AI总结：
本文提出一种真空腔外紧凑双色紫外成像系统，通过球面-非球面双合透镜在共享EMCCD上同时分辨成像In⁺/Yb⁺库仑晶体，兼顾230.6 nm深紫外与低散射率离子的大视场单离子探测。
摘要：
我们展示了一套紧凑的双色成像系统，该系统位于俘获离子装置的真空腔外，能够在共享的EMCCD相机上同时收集230.6 nm和369.5 nm光子的荧光。该系统包含两个透镜双合透镜，每个双合透镜由一个球面透镜和一个非球面透镜组成。它在230.6 nm和369.5 nm处分别提供0.45和0.40的数值孔径，并能够对长尺寸的$^{115}$In$^+$/$^{172}$Yb$^+$库仑晶体实现300 $μ$m大视场的空间分辨态探测。该系统的重点不是针对单一波长实现衍射极限成像，而是在大视场上对两种离子同时进行单离子分辨成像，并特别关注深紫外波长（230.6 nm）以及In$^+$离子的低散射率。所提出的概念适用于其他双离子种类的应用。
英文摘要：
We present a compact and bichromatic imaging system, located outside of the vacuum chamber of a trapped ion apparatus, that collects the fluorescence of 230.6 nm and 369.5 nm photons simultaneously on a shared EMCCD camera. The system contains two lens doublets, consisting of a sphere and an asphere. It provides a numerical aperture of 0.45 and 0.40 at 230.6 nm and 369.5 nm, respectively, and enables spatially resolved state detection with a large field of view of 300 $μ$m for long $^{115}$In$^+$/$^{172}$Yb$^+$ Coulomb crystals. Instead of diffraction limited imaging for one wavelength, the focus in this system is on simultaneous single-ion resolved imaging of both species over a large field with special attention to the deep UV wavelength (230.6 nm) and the low scattering rate of In$^+$ ions. The introduced concept is applicable to other dual-species applications.
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