Time Dependent Third Order Nonlinear Optical Susceptibility Tensor Components of the Carbon Disulfide Molecule using Femtosecond Degenerate Four-Wave Mixing

TL;DR

This study measures the third-order nonlinear optical susceptibility tensor components of CS2 at 515 nm using femtosecond degenerate four-wave mixing, revealing the importance of time scales and wavelengths in nonlinear optical measurements.

Contribution

It provides the first time-resolved measurement of all third-order susceptibility components of CS2 at 515 nm with femtosecond resolution, highlighting dynamic effects.

Findings

All tensor components of CS2's third-order susceptibility were measured.

The results show significant time-dependent behavior of nonlinear response.

The study underscores the influence of pulse duration and wavelength on nonlinear measurements.

Abstract

We report time resolved studies and measurement of all the components of the third-order nonlinear optical susceptibility of CS2 at 515 nm using degenerate four wave mixing. The use of a pulse of width 450 fs, which is comparable to the time scale of the molecular reorientation dynamics of CS2 makes our study unique. Given the wide use of this molecule as a reference material, our results will not only be a useful addition to the data base of the nonlinear optical properties of CS2, but also provide additional insights into the time dynamics of the nonlinear processes involved. These results emphasize the importance of the time scales and wavelengths used to report the nonlinear optical susceptibility values for the reference material too.