Exploitation of a chiral microscope

光学活性手性超薄膜的微观识别一直被认为是不可能的，因为10^&lt；-3&gt；-10^&lt；-5&gt；阶电偶极禁戒圆二色谱的灵敏度极低。我们的结论是，利用角分辨光电子能谱来实现电偶极圆二向色性是可能的。我们开发了一种手性紫外光电子发射显微镜纳米显微镜，它满足了亚单层灵敏度、纳米级空间分辨率和飞秒时间分辨率的要求。有机手性材料的微观测量正在进行中。

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.