Double-sided T-shaped-disk Waveguide Filters Based on Plasmon-induced Transparency

WU De-chang; YANG Shu

doi:10.3788/fgxb20163710.1287

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Double-sided T-shaped-disk Waveguide Filters Based on Plasmon-induced Transparency

更新时间：2020-08-12

- Double-sided T-shaped-disk Waveguide Filters Based on Plasmon-induced Transparency
- Chinese Journal of Luminescence Vol. 37, Issue 10, Pages: 1287-1291(2016)
- 作者机构：
  
  北京邮电大学理学院北京,100876
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163710.1287
  CLC： O539
- Received：06 May 2016，
  
  Revised：29 June 2016，
  
  Published：05 October 2016
- 稿件说明：
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吴德昌, 杨树,. 等离子体诱导透明的T形-圆形波导滤波器[J]. 发光学报, 2016,37(10): 1287-1291

WU De-chang, YANG Shu,. Double-sided T-shaped-disk Waveguide Filters Based on Plasmon-induced Transparency[J]. Chinese Journal of Luminescence, 2016,37(10): 1287-1291
吴德昌, 杨树,. 等离子体诱导透明的T形-圆形波导滤波器[J]. 发光学报, 2016,37(10): 1287-1291 DOI： 10.3788/fgxb20163710.1287.

WU De-chang, YANG Shu,. Double-sided T-shaped-disk Waveguide Filters Based on Plasmon-induced Transparency[J]. Chinese Journal of Luminescence, 2016,37(10): 1287-1291 DOI： 10.3788/fgxb20163710.1287.

摘要

提出一种新型的由T形与圆形谐振腔组成的光学滤波器，并利用二维有限元法研究了它的特性。仿真结果显示，当这两个腔在共振峰附近处于失谐状态时，会产生电磁诱导透明现象；同时，由于两个腔的透射谱形是不同的，所以当改变圆形腔的半径或T形结构的宽度时，总体结构的透射谱形会呈现为一种Fano线，这种变化尖锐非对称的Fano线使得结构对于折射率的敏感性高达1 400 nm/RIU。本文还研究了滤波器特性随结构尺寸的变化，发现在滤波器几何结构一定的情况下，透射只发生在特定的波长处。该滤波器可以用于光子回路和灵敏探测。

Abstract

The coupled-resonator structure consisting of a T-shaped resonator and a nanodisk resonator was proposed and numerically investigated by using a two-dimensional finite element method. When the two cavities are at the condition of detuning

the plasmon-induced transparency (PIT) and the sharp asymmetric Fano lines will appear due to the difference of the cavitiestransmittance. Fano-lines increase the sensitivity to 1.410

nm/RIU. The properties of the structure with different radii of the nanodisk and the length of the rectangle cavity were also analyzed. It is found that the PIT only happens when the staggered system is at around of a fixed location with different geometric construction. This model may be important for photonic-integrated circuits and the sensitivity in sensors.

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references

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