A single-shot spatial chirp method for measuring initial AC conductivity evolution of femtosecond laser pulse excited warm dense matter

Z Chen; P Hering; S B Brown; C Curry; Y Y Tsui; S H Glenzer

doi:10.1063/1.4962057

A single-shot spatial chirp method for measuring initial AC conductivity evolution of femtosecond laser pulse excited warm dense matter

Rev Sci Instrum. 2016 Nov;87(11):11E548. doi: 10.1063/1.4962057.

Authors

Z Chen¹, P Hering¹, S B Brown¹, C Curry¹, Y Y Tsui², S H Glenzer¹

Affiliations

¹ SLAC National Accelerator Laboratory, Menlo Park, California 94086, USA.
² Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G-2V4, Canada.

PMID: 27910393
DOI: 10.1063/1.4962057

Abstract

To study the rapid evolution of AC conductivity from ultrafast laser excited warm dense matter (WDM), a spatial chirp single-shot method is developed utilizing a crossing angle pump-probe configuration. The pump beam is shaped individually in two spatial dimensions so that it can provide both sufficient laser intensity to excite the material to warm dense matter state and a uniform time window of up to 1 ps with sub-100 fs FWHM temporal resolution. Temporal evolution of AC conductivity in laser excited warm dense gold was also measured.