Issue 34, 2021

Progress in phase-sensitive sum frequency generation spectroscopy

Abstract

Sum frequency generation (SFG) spectroscopy is a unique and powerful tool for investigating surfaces and interfaces at the molecular level. Phase-sensitive SFG (PS-SFG) is an upgraded technique that can overcome the inherent drawbacks of conventional SFG. Here we review several methods of PS-SFG developed and reported in 1990–2020. We introduce how and by which group each PS-SFG method was designed and built in terms of interferometer implementation for optical heterodyne detection, with one exception of a recent numerical method that does not rely on interferometry. We also discuss how PS-SFG solved some typical problems for aqueous interfaces that were once left open by conventional SFG. These problems and their solutions are good examples to demonstrate why PS-SFG is essential. In addition, we briefly note a few terminology issues related with PS-SFG to avoid confusion.

Graphical abstract: Progress in phase-sensitive sum frequency generation spectroscopy

Article information

Article type
Perspective
Submitted
06 ሜይ 2021
Accepted
25 ጁን 2021
First published
25 ጁን 2021

Phys. Chem. Chem. Phys., 2021,23, 18253-18267

Progress in phase-sensitive sum frequency generation spectroscopy

S. Yamaguchi and T. Otosu, Phys. Chem. Chem. Phys., 2021, 23, 18253 DOI: 10.1039/D1CP01994E

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