本项目围绕光子人工微结构，对光子连续谱束缚态（简称BIC）的场局域形态及其调控展开研究。项目的研究目标是通过光子人工微结构的特殊设计，弄清BIC场局域的特点，揭示通过BIC进行场局域调控的物理机制，进而利用BIC特殊的场局域，研究光与人工微结构及非线性物质的相互作用新效应，探索利用光子人工微结构进行电磁波调控的新机理。主要研究内容包括：对称保护以及多通道相干相消两种BIC机制和关键微结构参数研究，实现对光子人工微结构BIC的精确操控；两种BIC的场局域特点、与常规束缚态的差别及其调控研究，重点是基于法诺共振物理图像，找到调控两种BIC场局域形态的关键模型和结构参量；BIC光子态的磁非线性等新奇非线性效应研究。以上研究，可以拓展对BIC新物理的认识，帮助人们更好地利用光子人工微结构BIC，来调控光（波）与物质的相互作用。项目的研究成果不仅有重要的科学意义，而且对相关器件研发具有广泛指导意义。

The proposed project aims to study the manipulation of field localization with bound states in the continuum (BIC) in engineered photonic structures. We will clarify the characteristics of field profile of BIC, reveal the physical mechanism in controlling the field localization with two kinds of BICs (symmetry-protected and multi-channel destructive interference), and then investigate the nonlinear BIC, through the special design of engineered photonic structures. The project mainly focuses on the following aspects: First, we will study the mechanisms and key parameters of engineered photonic structures in adjusting the symmetry protection and multi-channel destructive interference to achieve precise control of BIC. Second, we will study the field localization of two BICs from the view point of Fano resonance. Finally, we will investigate the novel nonlinear effects of BICs, including magnetic nonlinearity. We expect that our research could expand the understanding of BIC's new physics, on one hand. On the other hand, the results of the proposed project may be important for potential applications of BICs in photonic and electromagnetic devices.