Microwave liquid crystal wavelength selector

被引:40
作者
Yang, FZ [1 ]
Sambles, JR [1 ]
机构
[1] Univ Exeter, Sch Phys, Thin Film Photon Grp, Exeter EX4 4QL, Devon, England
关键词
D O I
10.1063/1.1419240
中图分类号
O59 [应用物理学];
学科分类号
摘要
The combined use of a zero-order grating with liquid crystals to control microwaves is presented. A nematic liquid crystal is aligned in the 75 mum gaps of a grating comprised of 1-mm-thick aluminum slats. A set of resonant transmission frequencies is recorded for microwaves incident on this structure with their electric field perpendicular to the slats. These resonances are due to the excitation of coupled surface plasmons. A voltage applied between adjacent pairs of slats causes the liquid crystal to realign, allowing sensitive control of the transmitted microwave frequencies. (C) 2001 American Institute of Physics.
引用
收藏
页码:3717 / 3719
页数:3
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