Mohammadimasoudi Mohammad, Khoshkhati Farid, Sohrabnavi Houriyeh, Neyts Kristiaan
Opt Lett. 2022 Aug 1;47(15):3760-3763. doi: 10.1364/OL.464754.
A thin, waterproof, and stable spatially tunable band reject filter is fabricated based on a chiral nematic liquid crystal polymer. The fabrication method for this filter is new, to the best of our knowledge, and straightforward. The photonic bandgap (PBG) of the proposed filter can be tuned from 350 nm to 760 nm by a mechanical movement of 6.5 mm. The filter reflects almost 50% of unpolarized incident light in the PBG and remains practically transparent for other wavelengths. The filter remains stable for four years and has acceptable resistance to polar protic solvents and thermal stability up to 90°C. The filter can be detached from the glass substrates, to be used as a thin 8-µm free-standing film or to be attached to a flexible substrate. This spatial tunable band reject filter may be used in displays, optical devices, and optical communication.
基于手性向列型液晶聚合物制备了一种薄的、防水且稳定的空间可调带阻滤波器。据我们所知，该滤波器的制造方法新颖且简单。通过6.5毫米的机械移动，所提出滤波器的光子带隙（PBG）可在350纳米至760纳米之间调谐。该滤波器在光子带隙中反射近50%的非偏振入射光，而对其他波长实际上保持透明。该滤波器四年保持稳定，对极性质子溶剂具有可接受的耐受性，热稳定性高达90°C。该滤波器可从玻璃基板上分离，用作8微米厚的独立薄膜，或附着在柔性基板上。这种空间可调带阻滤波器可用于显示器、光学器件和光通信。
