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
24 رمضان 1442
Accepted
15 ذو القعدة 1442
First published
15 ذو القعدة 1442

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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