Optica Open
arXiv.svg (5.58 kB)
Download file

Time-correlated electron and photon counting microscopy

Download (5.58 kB)
posted on 2023-01-21, 17:02 authored by Sotatsu Yanagimoto, Naoki Yamamoto, Tatsuro Yuge, Hikaru Saito, Keiichirou Akiba, Takumi Sannomiya
Electron microscopy based on high-energy electrons allows nanoscopic structural imaging and nano-analysis taking advantage of secondarily generated particles, such as secondary electrons, photons, or quasi-particles. Especially for the photon emission upon electron beam excitation, so-called cathodoluminescence, the correlation between primary incident electrons and emitted photons includes information on the entire interaction process. In this work, we propose time-correlated electron and photon counting microscopy, where coincidence events of primary electrons and generated photons are counted after interaction. The electron-photon time correlation enables extracting an emitter lifetime and is applicable to both coherent and incoherent photon generation processes, demonstrating a universal lifetime measurement independent of the photon state. We also introduce a correlation factor and discuss the correlation between electrons and generated coherent photons. Through momentum selection, we observe correlation changes, indicating the effective contribution of pair correlation originating from the electron-photon entanglement based on momentum conservation. The present work is a milestone for next-generation electron microscopy utilizing quantum correlation.



This arXiv metadata record was not reviewed or approved by, nor does it necessarily express or reflect the policies or opinions of, arXiv.

Usage metrics