We theoretically demonstrate a high-Q and intense lattice plasmon resonance supported by the hexagonal nonclose packed thin silver nanoshells array. By introducing the diffraction coupling mechanism, the high-Q and intense lattice plasmon mode stemmed from the coupling between the TM₁ cavity plasmon mode and the diffraction mode of the first-order Wood anomaly is obtained in the thin silver nanoshells array, successfully solving the trade-off between the Q-factor and the resonance intensity of the cavity plasmon mode existed in a single silver nanoshell. In particular, a maximum Q-factor up to 610 of the lattice plasmon resonance is successfully achieved at 870 nm in the silver nanoshell array with an optimal silver thickness of 20 nm.

中文翻译：

---

六方非密堆积薄银纳米壳阵列中的高 Q 值和强晶格等离子体共振

我们从理论上证明了由六角形非密堆积薄银纳米壳阵列支持的高Q值和强晶格等离子体共振。通过引入衍射耦合机制，在薄银纳米壳阵列中获得了TM ₁腔等离子体模式与一阶Wood异常衍射模式耦合产生的高Q值和强晶格等离子体模式，成功解决了在单个银纳米壳中存在Q因子和腔等离子体激元模式的共振强度之间的权衡。特别是，在最佳银厚度为 20 nm 的银纳米壳阵列中，在 870 nm 处成功实现了高达 610 的晶格等离子体共振的最大Q因子。