Tunable magnetic response of metamaterials

被引：158
|
作者：
Xiao, Shumin [1 ,2 ]
Chettiar, Uday K. [1 ,2 ]
Kildishev, Alexander V. [1 ,2 ]
Drachev, Vladimir [1 ,2 ]
Khoo, I. C. [3 ]
Shalaev, Vladimir M. [1 ,2 ]
机构：
[1] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA
[2] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA
[3] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 03期
基金：
美国国家科学基金会;
关键词：
liquid crystal phase transformations; magnetic permeability; metamaterials; molecular orientation; nanostructured materials; nematic liquid crystals; refractive index; visible spectra; NEGATIVE-INDEX; REFRACTION; ALIGNMENT;
D O I：
10.1063/1.3182857
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate a thermally tunable optical metamaterial with negative permeability working in the visible range. By covering coupled metallic nanostrips with aligned nematic liquid crystals (NLCs), the magnetic response wavelength of the metamaterial is effectively tuned through control of the ambient temperature, changing the refractive index of LC via phase transitions. By increasing the ambient temperature from 20 to 50 degrees C, the magnetic response wavelength shifts from 650 to 632 nm. Numerical simulations confirm our tests and match the experimental observations well.
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页数：3
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