AI 中文总结
该研究针对现有BIC波导设计灵活性不足的问题，提出采用亚波长光栅超材料实现人工光学各向异性的新范式，实现了BIC波导的灵活调控，为集成光子器件提供通用框架。
AI 中文摘要
连续谱中的束缚态（BIC）可实现反直觉的光约束且无辐射损耗，为集成光子波导提供了强大基础。但现有BIC波导主要通过依赖几何结构的设计实现，其BIC条件受限于狭窄的结构参数，限制了设计灵活性与实际适用性。本文引入人工光学各向异性作为BIC波导的新设计范式，采用亚波长光栅（SWG）超材料实现，可连续调控的各向异性为确定性重塑辐射连续谱提供了独立自由度，能在宽广设计空间内灵活形成并系统控制BIC波导。各向异性调控的对称性破缺还可实现可控的非对称辐射与精确调控的场泄漏。该范式将BIC波导从几何约束结构转变为各向异性调控平台，为可编程辐射工程及下一代集成光子器件建立了通用框架。
英文摘要
Bound states in the continuum (BICs) enable counterintuitive light confinement without radiation loss, providing a powerful foundation for integrated photonic waveguides. However, existing BIC waveguides are predominantly realized through geometry-dependent designs, where the BIC condition is restricted to narrowly defined structural parameters, limiting design flexibility and practical applicability. Artificial optical anisotropy is introduced as a new design paradigm for BIC waveguides. Implemented using subwavelength-grating (SWG) metamaterials, continuously tailorable anisotropy provides an independent degree of freedom for deterministically reshaping the radiative continuum, enabling flexible formation and systematic control of BIC waveguides over a broad design space. Anisotropy-engineered symmetry breaking further enables controllable asymmetric radiation and precisely tailored field leakage. This paradigm transforms BIC waveguides from geometry-constrained structures into an anisotropy-engineered platform, establishing a general framework for programmable radiation engineering and next-generation integrated photonic devices.
Comments13 pages, 5 figures
