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Time-Resolved Ultrafast Transient Polarization Spectroscopy to Investigate Nonlinear Processes and Dynamics in Electronically Excited Molecules on the Femtosecond Time Scale

Authors :
Thurston, Richard
Brister, Matthew M.
Belkacem, Ali
Weber, Thorsten
Shivaram, Niranjan
Slaughter, Daniel S.
Source :
Review of Scientific Instruments 91, 053101 (2020)
Publication Year :
2019

Abstract

We report a novel experimental technique to investigate ultrafast dynamics in photoexcited molecules by probing the third-order nonlinear optical susceptibility. A non-colinear 3-pulse scheme is developed to probe the ultrafast dynamics of excited electronic states using the optical Kerr effect by time-resolved polarization spectroscopy. Optical heterodyne and optical homodyne detection are demonstrated to measure the third-order nonlinear optical response for the S1 excited state of liquid nitrobenzene, which is populated by 2-photon absorption of a 780 nm 35 fs excitation pulse.<br />Comment: 12 pages, 4 figures. Changes from previous version: added panel labels to figures 3-4

Subjects

Subjects :
Physics - Chemical Physics

Details

Database :
arXiv
Journal :
Review of Scientific Instruments 91, 053101 (2020)
Publication Type :
Report
Accession number :
edsarx.1912.12124
Document Type :
Working Paper
Full Text :
https://doi.org/10.1063/1.5144482