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Dual‐Band Bound States in the Continuum
In article number 2301206, Shubin Zhang, Meixue Zong, Zhengji Xu, and co‐workers propose and experimentally prove a new strategy to realize the dual‐band bound states in the continuum (BICs) on an all‐dielectric metasurface. In normal incidence conditions, the two BIC modes supported by air gaps and gratings can be controlled independently. The resulting high...
Bound states in the continuum (BIC) are localized states coexisting with extended waves in the continuum spectrum and have infinite lifetimes without emitting radiation. In practice, symmetry‐protected BIC are usually extended to quasi‐BIC by breaking symmetry is commonly employed. A new strategy to realize the dual‐band BIC on an all‐dielectric metasurface is proposed and experimentally proved. This...
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