Toward unlimited temporal resolution: femtosecond videography for atomic and molecular dynamics  

作　　者：Hongwei Chen 

机构地区：[1]Tsinghua National Laboratory for Information Science and Technology(TNLIST),Department of Electronic Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Light(Science & Applications)》2017年第1期142-143,共2页光（科学与应用)（英文版）

摘　　要：To reveal the fundamental aspects hidden behind various biological,chemical and physical phenomena,the capability of acquiring images with an ultrafast temporal resolution is indispensable and highly desired.The imaging frame rate of traditional CCD and CMOS imager usually only reaches sub-MHz,which is limited by the tradeoff between sensitivity and integration time1.The pump–probe scheme is widely applied in scientific imaging for its high-temporal resolution of pico-second level2.Recently,to film the events in chemical reactions,pump–probe combined with scanning tunneling microscopy(STM)or X-ray schemes are proposed.They can take the snapshots with enhanced resolution to femtosecond for producing true molecular movies3.However,it is only applicable for respective events,hence,falls short of capturing non-repetitive or destructive events,which count the majority in nature.

关 键 词：RESOLUTION hence DESIRED 

分 类 号：O43[机械工程—光学工程]