Exploitation of a chiral microscope

由于10^<-3>-10^<-5>阶的电偶极子禁止圆二色性的极低灵敏度，光学活性手性超薄膜的显微识别被认为几乎是不可能的。我们得出的结论是，利用角分辨光发射是可能的，通过它可以允许电偶极子圆二色性。我们开发了一种符合亚单层灵敏度、纳米尺度空间分辨率和飞秒时间分辨率要求的紫外光电子发射显微镜的手性纳米显微镜。有机手性材料的显微测量正在进行中。

Microscopic recognition of optically active chiral ultrathin films has been considered to be almost impossible because of the extremely low sensitivity of the electric-dipole forbidden circular dichroism of 10^<-3>-10^<-5> order. We concluded that the exploitation would be possible to employ angle-resolved photoemission by which the electric-dipole circular dichroism is allowed. We have developed a chiral nanoscope of ultraviolet photoelectron emission microscopy that matches requirements of the submonolayer sensitivity, the nanometer scale spatial resolution, and the femtosecond time resolution. Microscopic measurements of organic chiral materials are in progress.