2024年10月18日，wiley 旗下top期刊《Advanced Functional Materials 》在线发表了云南师范大学物理与电子信息学院邰永航教授课题组最新研究成果《Liquid Crystal Enables Extraordinarily Precise Tunability for a High-Q Ultra-Narrowband Filter Based on a Quasi-BIC Metasurface》。第一作者为中国科学院大学温州生物物理学重点实验室、浙江省瓯江实验室(再生调控与眼脑健康浙江省实验室)余彬彬副研究员。云南师范大学物理与电子信息学院邰永航教授、国科温州研究院李涛研究员和余彬彬副研究员为共同通讯作者。

https://onlinelibrary.wiley.com/doi/10.1002/adfm.202413098

Abstract

Notch filters usually involve high costs, great difficulties in processing, and very limited tunability. By coating a nematic liquid crystal (LC) layer onto a well-designed quasi-bound states in the continuum (quasi-BICs) metasurface, this work designs and demonstrates a high-Q tunable filtering system with precise tunability in the near-infrared spectral range. Optimal structural parameters and the filtering performance are first determined by numerical simulations and then confirmed in experiments. The precise tunability is enabled by modifying the LC molecules’ principal axes with an applied voltage, where the least distinguishable central wavelength interval is smaller than 0.3 nm, and the largest Q factor extracted from experiments can be ≈256.1. Compared to most of the commercial notch filters that work in the visible region and have no tunability, this work achieves an ultra-narrowband filtering system that features low manufacture difficulty and cost, and great control of light propagation. The proposed design also opens new avenues for developing BIC-based high-Q devices with enhanced signal-to-noise ratio and multifunctional properties.

扩展阅读：

云师大物电学院黄小乔、邰永航教授在知名期刊《Renewable Energy》发表最新研究成果

云师大物电学院黄小乔、邰永航教授在知名期刊《Journal of Cleaner Product》发表最新研究成果

云师大高文峰、季旭、邰永航三教授接连在新能源期刊《Renewable Energy》上发表最新研究成果