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<p>Bound states in the continuum (BICs) have great potential in enhancing light-matter interactions due to their infinite Q-factors. Currently, symmetry—protected bound states (SP—BICs) have been extensively studied. To convert SP—BICs into quasi—bound states (QBICs), it is necessary to break the structural symmetry to increase the radiation channels. In practical operations, QBICs are often generated by adding or removing part of the structure, changing the relative position or relative size of the structure, etc. In this study, we designed three highly symmetric structures. By changing the polarization direction of the incident light, we controlled the generation of QBICs and provided a quantitative relationship between the deflection angle and the Q-factor. Our research provides a new scheme for the generation of QBICs and deepens the understanding of polarization.</p>

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The role of polarization direction in achieving quasi-BIC supported by single nanorods

  • 期刊论文

  • 发表日期：

    2025年11月6日

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  • Shuo Yang,
  • Qi Wu,
  • Liping Wang

摘要

Bound states in the continuum (BICs) have great potential in enhancing light-matter interactions due to their infinite Q-factors. Currently, symmetry—protected bound states (SP—BICs) have been extensively studied. To convert SP—BICs into quasi—bound states (QBICs), it is necessary to break the structural symmetry to increase the radiation channels. In practical operations, QBICs are often generated by adding or removing part of the structure, changing the relative position or relative size of the structure, etc. In this study, we designed three highly symmetric structures. By changing the polarization direction of the incident light, we controlled the generation of QBICs and provided a quantitative relationship between the deflection angle and the Q-factor. Our research provides a new scheme for the generation of QBICs and deepens the understanding of polarization.