Modulation of double-frequency BICs

FANG Yuntuan; XIA Lou

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Modulation of double-frequency BICs

Micro and Nano Optics | 更新时间：2026-01-22

- Modulation of double-frequency BICs
- OPTICAL TECHNIQUE Vol. 52, Issue 1, Pages: 80-85(2026)
- 作者机构：
  
  1.南通理工学院信息工程学院，江苏南通 226002
  2.江苏大学计算机科学与通信工程学院，江苏镇江 212013
- 作者简介：
- 基金信息：
- DOI：
  CLC： O734
- Received：12 September 2025，
  
  Revised：2025-10-18，
  
  Published：20 January 2026
- 稿件说明：
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FANG Yuntuan, XIA Lou. Modulation of double-frequency BICs[J]. OPTICAL TECHNIQUE, 2026, 52(1): 80-85.
DOI：

FANG Yuntuan, XIA Lou. Modulation of double-frequency BICs[J]. OPTICAL TECHNIQUE, 2026, 52(1): 80-85. DOI：

摘要

为解决连续体中的束缚态（BIC）在应用中模式单一且不能连续调制的问题，设计三层光栅与平面波导的复合结构。通过对结构能带的计算和模式的分析，发现该结构产生双频BIC和共振态。双频BIC和共振态的频率可以被两种结构参数调节。通过光栅间不同形式的平移错位，使双频BIC和共振态形成的法诺共振峰产生连续的变化。通过平移调控，BIC模式和共振态产生耦合并形成双重的法诺共振，形成一对完全透射和完全反射两个状态相反的准BIC法诺共振峰。特别地，平移调控还会产生独特的呈镜像对称的一对法诺共振峰；在特定的平移距离，出现光学类电磁诱导透明现象。

Abstract

In order to address the problem that bound states in the continuum are isolated and lack of modulation method

a three-fold compound structure composed of waveguide and grating is designed. Through band calculations and mode analysis

the structure is found to have double-frequency bound states in the continuum and resonance states. The frequencies of dual-frequency BIC and resonant state can be adjusted by two structural parameters. Through the translational displacement between gratings with three forms

the Fano resonance peaks formed by them have an interesting evolution. The coupling of dual- freauency BICs and resonant states generates dual

uasi-BIC Fano resonance peaks with complete transmission and reflection

respectively. Specifically

at a specific translation distance

a pair of Fano resonance peaks with mirror-symmetry and an optical electromagnetic induced transparency phenomenon are also found.

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references

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