High-g-Factor Phase-Matched Circular Dichroism of Second Harmonic Generation in Chiral Polar Liquids

TL;DR

This paper reports a novel bulk-material-induced circular dichroism in second harmonic generation within chiral polar liquids, achieving a record g-factor of 1.8, which advances nonlinear optical chiroptical applications.

Contribution

It introduces a new phenomenon of bulk-material-induced circular dichroism in SHG with high g-factor, differing from surface-based responses.

Findings

Record g-factor of 1.8 in SHG circular dichroism

Demonstration of bulk-material-induced chiroptical response

Advancement in nonlinear optical chiral sensing

Abstract

Circular dichroism is a technologically important phenomenon contrasting the absorption and resultant emission properties between left- and right-handed circularly polarized light. While the chiral handedness of systems mainly determines the mechanism of the circular dichroism in linear optics, the counterpart in the nonlinear optical regime is nontrivial. Here, in contrast to traditional nonlinear circular dichroism responses from structured surfaces, we report on an unprecedented bulk-material-induced circular dichroism of second harmonic generation with a massive g-factor up to 1.8.