Photonic Phase Matching for SHG Driven by Obliquely Incident Light into Ferroelectric Liquid Crystal Helix

Abstract

Photonic phase matching was obtained using a single fundamental wave obliquely incident into ferroelectric liquid crystal helix, when both of fundamental and SH waves satisfy Bragg reflection condition. Peak position of second-harmonic generation (SHG) with respect to increasing incidence angle moved to higher temperature due to decreasing pitch and its intensity is increased with increasing reflection at both of fundamental and SH waves. Observed reflective SH wave as well as transmitted one was well explained by the Bragg reflection rule.