16 February 2009 Terahertz liquid crystal tunable filter
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We construct and characterize a room-temperature tunable Terahertz(THz) liquid crystal(LC) filter. Liquid crystal is a substance which is intervenient between inerratic crystal and isotropy liquid, because their molecular long-range are not likeness crystal, so they are easily affected by exterior conditions, such as electric field, magnetic field, temperature and stress etc., accordingly, their optical characters are change. According to the electrooptic effect of liquid crystal and the theory of Lyot filter, tunable Lyot liquid crystal filter is designed and tunable F-P liquid crystal filter is designed too. It is proved that the tunable liquid crystal filter has great tuning range and narrow band.
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Guang-jun Ren, Xin-chuang Wang, Xiu-rong Ma, Jian-quan Yao, "Terahertz liquid crystal tunable filter", Proc. SPIE 7277, Photonics and Optoelectronics Meetings (POEM) 2008: Terahertz Science and Technology, 72770L (16 February 2009); doi: 10.1117/12.821478; https://doi.org/10.1117/12.821478

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