Measurement of a Preresonant Hyper-Raman Hyperpolarizability
Abstract
Four wave mixing (FWM) spectroscopy is used to measure a preresonant hyper-Raman hyperpolarizability. The four wave mixing process known as hyper-difference frequency generation (HDFG), which depends upon the hyper-Raman hyperpolarizability, can be measured simultaneously with other well-studied four-wave mixing processes, which serve as an internal standard. We use coherent anti-Stokes Raman (CARS) response from deuterobenzene to quantify the acetonitrile ν(CN) hyper-Raman hyperpolarizability. This internal standard method is applicable to any infrared active vibration and greatly diminishes the barriers to quantification of hyper-Raman hyperpolarizabilities.
Fields of Study & Subjects
Nonlinear Optical Materials Research
Spectroscopy Techniques in Biomedical and Chemical Research
Spectroscopy and Quantum Chemical Studies
Publication details
- Journal / source
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Volume
- 17
- Issue
- 10
- Pages
- 2919–2925
- Publication date
- 26 February 2026
- Language
- EN