A simple one-dimensional subwavelength plasmonic grating can support symmetry protected bound states in the continuum (BICs), but not necessarily for the non-symmetry protected BICs. By dimerizing the lattice, non-symmetry protected BIC can be supported on the dimerized grating and can be tuned readily. The mechanism for the BICs in the dimerized grating is interpreted in the viewpoint of interference between the electromagnetic multipoles.

中文翻译：

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一维二聚等离子体激元光栅中连续体的束缚态

一个简单的一维亚波长等离子体激元光栅可以支持连续体（BIC）中受对称保护的束缚态，但对于非对称受保护的BIC则不一定。通过对晶格进行二值化，可以将非对称性受保护的BIC支持在二值化后的光栅上，并且可以轻松进行调谐。从电磁多极之间的干扰的角度解释了二聚化光栅中BIC的机制。