论文部分内容阅读
在近红外成像领域,用亚波长尺寸探针扫描样品区域,获得了超过光学显微镜衍射极限的分辨率。在最近的实验中,用分子纳米显微镜探针,获得了几十纳米的分辨率。一般是把探针插入晶体附在基片移动层上,实现分子探针的位置控制。但是基质晶体不可避免引起扰动待测光场。报道用原子尺寸分辨率的近场探针(射频捕陷的单个钙离子)使光场扰动最小。测量了光场的三维空间结构,获得空间分辨率高达60um(由捕陷离子的残余热运动决定),并在100μm范围扫描低损耗光腔模。通过准确控制离子与场的耦合,达到精确定位。同时,捕陷势不影响场和离子的中间态。因此,该装置是用单粒子进行腔量子电动力学实验的理想系统。
In the field of near-infrared imaging, sub-wavelength size probes are used to scan the sample area to obtain a resolution that exceeds the diffraction limit of an optical microscope. In recent experiments, molecular nanoscopic probes were used to obtain resolutions of tens of nanometers. Generally, the probe is inserted into the crystal and attached to the moving layer of the substrate to realize the position control of the molecular probe. However, the matrix crystals inevitably cause perturbation of the optical field to be measured. Near field probes (single calcium ions trapped by radio frequency) with atomic resolution are reported to minimize light field perturbations. The three-dimensional spatial structure of the light field was measured to obtain a spatial resolution of up to 60 um (determined by the residual thermal motion of trapped ions) and a low-loss cavity mode was scanned in the 100 μm range. By precisely controlling the coupling of the ions to the field, precise positioning is achieved. At the same time, catastrophe does not affect the field and ion intermediate state. Therefore, the device is an ideal system for single-particle cavity quantum electrodynamics experiments.