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arXiv 2201.03729physics.opticsphysics.app-ph
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用于调谐介电超颖表面共振的温度依赖性液晶基超颖材料的设计、制造和光谱表征

Design, fabrication, and spectral characterization of temperature-dependent liquid crystal-based metamaterial to tune dielectric metasurface resonances

Golsa Mirbagheri, David T. Crouse

摘要:

可调谐介电亚表面纳米结构在光学应用中提供了令人难以置信的性能,这是由于其非凡的偏振可调谐性和在红外范围内以低损耗设计光的光的色散。在这篇文章中,我们设计和实验测量的全介质亚波长硅纳米粒子的可调谐性的帮助下,基于温度的折射率的液晶在电信制度。用数值软件模拟了由高介电纳米盘包围的双液晶(NLC)结构,用预取向材料组装,并通过傅里叶变换红外(FTIR)光谱进行了光学测量。模拟结果与实际测量结果相一致,表明该调谐器达到了30nm的可调谐性。利用各向异性的温度依赖性非线性电容器,以不同的速率对高介电纳米盘的电和磁共振模式进行剪裁。各向异性到各向同性液晶液晶的相位切换实现了全介电超颖表面的两种模式的光谱调谐,并且修改了超颖材料结构的光学响应的对称性。

英文摘要:

Tunable dielectric meta-surface nanostructures offer incredible performance in optical application due to their extraordinary tunability of the polarization and engineering the dispersion of light with low loss in infrared range. In this article, we designed and experimentally measured the tunability of all-dielectric subwavelength silicon nanoparticles with the help of the temperature-based refractive index of the liquid crystal in the telecom regime. The proposed structure composed of high dielectric nanodisk surrounded by nematic liquid crystal (NLC) is simulated with numerical software, assembled with pre-alignment material, and optically measured by Fourier-transform infrared (FTIR) spectroscopy. The simulated result is compatible with the practical measurements, shows that the tunability of 30nm is achieved. Electric and magnetic resonance modes of the high dielectric nanodisks are tailored in different rates by anisotropic temperature dependent NLC. The phase switching of anisotropic to isotropic nematic liquid crystal enables spectral tunning of the two modes of all dielectric metasurface and modifies the symmetry of the optical response of the metamaterial structure.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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