Nonreciprocal Transmission of Circularly Polarized Light via Photothermal Phase Transition in Cholesteric Liquid Crystals

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Nonreciprocal devices, enabling asymmetric light transmission, are essential for many photonic applications. However, nonreciprocal devices driven by circularly polarized incident light, without relying on optical nonlinearity or magnetic fields, have been rarely reported. This study introduces a novel device based photothermally cholesteric‐to‐isotropic phase transition (CIT) in cholesteric liquid crystals (CLCs). The enables transmission of (CPL) requiring external bias, nonlinearity. By incorporating polydopamine (PDA)‐doped polyvinyl acetate (PVA) layer photothermal conversion, the achieves self‐biasing through heat generated signal light. performance is tunable, with contrast and insertion loss adjustable via PDA concentration. At 808 nm CPL, an isolation ratio 7.7 dB 1.1 dB. Additionally, extending bandgap CLCs allows at 405 high 16.5 also functions as switch, low‐power pump assistance, shows promise applications digital holography. These capabilities highlight device's potential use all‐optical communication networks chirality‐based systems.

Language: Английский

Upconversion circularly polarized luminescence with dissymmetry factor up to 1.80 from flexible Perovskite-Liquid crystal membranes

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162515 - 162515

Published: April 1, 2025

Language: Английский

Advances in perovskite lasers

Journal of Semiconductors, Journal Year: 2025, Volume and Issue: 46(4), P. 041401 - 041401

Published: April 1, 2025

Abstract Perovskite materials have emerged as promising candidates for various optoelectronic applications owing to their remarkable properties and easy solution processing. Metal halide perovskites, direct-bandgap semiconductors, show an excellent class of optical gain media, which makes them applicable the development low-threshold or even thresholdless lasers. This mini review explores recent advances in perovskite-based laser technology, led chiral single-mode microlasers, low-threshold, external-cavity-free lasing devices at room temperature, other innovative device architectures. Including self-assembled CsPbBr 3 microwires that enable edge lasing. Realized continuous-wave (CW) pumped by perovskite material pushes research electrically driven The capacity regulate charge transport perovskites further enhances applicability systems. ongoing integration with advanced photonic structures holds potential future innovations technology photovoltaics. We also highlight transformative advancing next generation efficient integrated devices.

Language: Английский