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Two-dimensional terahertz spectroscopy of condensed-phase molecular systems.

Two-dimensional terahertz spectroscopy of condensed-phase molecular systems.

Authors :
Reimann, Klaus
Woerner, Michael
Elsaesser, Thomas
Source :
Journal of Chemical Physics; 3/28/2021, Vol. 154 Issue 12, p1-14, 14p
Publication Year :
2021

Abstract

Nonlinear terahertz (THz) spectroscopy relies on the interaction of matter with few-cycle THz pulses of electric field amplitudes up to megavolts/centimeter (MV/cm). In condensed-phase molecular systems, both resonant interactions with elementary excitations at low frequencies such as intra- and intermolecular vibrations and nonresonant field-driven processes are relevant. Two-dimensional THz (2D-THz) spectroscopy is a key method for following nonequilibrium processes and dynamics of excitations to decipher the underlying interactions and molecular couplings. This article addresses the state of the art in 2D-THz spectroscopy by discussing the main concepts and illustrating them with recent results. The latter include the response of vibrational excitations in molecular crystals up to the nonperturbative regime of light–matter interaction and field-driven ionization processes and electron transport in liquid water. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00219606
Volume :
154
Issue :
12
Database :
Complementary Index
Journal :
Journal of Chemical Physics
Publication Type :
Academic Journal
Accession number :
149619900
Full Text :
https://doi.org/10.1063/5.0046664