Dual-Broadband Topological Photonic Crystal Edge State Based on Liquid Crystal Tunability.

ABSTRACT: The rapid advancements in optical communication and sensing technologies have significantly increased the demand for advanced tunable spectral systems. This study presents a dual-band terahertz transmission and manipulation approach by leveraging the topologically protected properties of valley-topological photonic crystal edge states. The designed structure facilitates the excitation of the K valley within the range of 0.851-0.934 THz and the K' valley from 1.604 to 1.686 THz, while also demonstrating anomalous refraction and birefringence. The calculated emission angles, derived through momentum matching, enable transitions between single-wave and dual-wave emissions and allow for precise angle control. The introduction of the liquid crystal material NJU-LDn-4 enables continuous tuning o

SUBMITTER: Zhang J 

PROVIDER: S-EPMC12194887 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature