Optofluidic tunable plasmonic filter based on liquid-crystal microcavity structures

Optofluidic tunable plasmonic filter based on liquid-crystal microcavity structures
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基于液晶微腔结构的光流控可调谐等离子体滤波器

DOI:
10.1080/09500340.2014.942403
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发表时间:
2014-09
影响因子:
1.3
通讯作者:
Yao, Duanzheng
Yao, Duanzheng
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Chen, Fang;Yao, Duanzheng

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给出了近红外光流控可调谐波长滤光片的理论论证。通过将向列相液晶(LC)引入缝隙谐振器,提出了一种纳米尺度的LC滤光片,并对其进行了数值研究。采用时域有限差分法对等离子体纳米结构的光学特性进行了数值模拟。考虑了两种方法来调谐滤光片的谐振波长,一种是基于光流控LC长度的微调,一种是基于LC双折射的粗调。微调和粗调都成功地操纵了滤光片的谐振波长。这种等离子体结构允许高精度地控制输入表面等离子体激元的传输。这种滤光片在高度集成的光路中可能有重要的潜在应用。
A theoretical demonstration of Optofluidic tunable wavelength filter in the near-infrared regime has been presented. By incorporating nematic liquid crystal (LC) into the slot resonator, a nanoscale LC optical filter is proposed and numerically investigated. The finite difference time domain method is used to simulate the optical characteristics of the plasmonic nanostructure. Two approaches are considered to tune the filter’s resonant wavelength, a fine tuning based on optofluidic control LC length and a coarse tuning based on LC birefringence. Both fine tuning and coarse tuning are successful for manipulating the filter’s resonant wavelength. This plasmonic structure permits the high-precision control of transmit of the input surface plasmon polaritons. The filters may have important potential application in highly integrated optical circuits.
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