Regular arrays of plasmonic nanoparticles have brought significant attention over the last decade due to their ability to support localized surface plasmons (LSPs) and exhibit diffractive grating behavior simultaneously. For a specific set of parameters (i.e., period, particle shape, size, and material), it is possible to generate super-narrow surface lattice resonances (SLRs) that are caused by interference of the LSP and the grating Rayleigh anomaly. In this letter, we propose plasmonic structures based on regular 2D arrays of TiN nanodisks to generate high-Q SLRs in an important telecommunication range, which is quite difficult to achieve with conventional plasmonic materials. The position of the SLR peak can be tailored within the whole telecommunication bandwidth (from ≈ 1.26 μm to ≈ 1.62 μm) by varying the lattice period, while the Q-factor is controlled by changing nanodisk sizes. We show that the Q-factor of SLRs can reach a value of 2 × 103, which is the highest reported Q-factor for SLRs at tele...

中文翻译：

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在电信波长下具有极窄表面晶格共振的难熔氮化钛二维结构

等离子体纳米粒子的规则阵列在过去十年中引起了极大的关注，因为它们能够支持局部表面等离子体 (LSP) 并同时表现出衍射光栅行为。对于一组特定的参数（即周期、粒子形状、尺寸和材料），可能会产生由 LSP 和光栅瑞利异常干扰引起的超窄表面晶格共振 (SLR)。在这封信中，我们提出了基于 TiN 纳米盘的规则 2D 阵列的等离子体结构，以在重要的电信范围内产生高 Q SLR，这是使用传统等离子体材料很难实现的。通过改变晶格周期，可以在整个电信带宽（从 ≈ 1.26 μm 到 ≈ 1.62 μm）内调整 SLR 峰值的位置，而 Q 因子是通过改变纳米盘尺寸来控制的。我们表明 SLR 的 Q 因子可以达到 2 × 103 的值，这是远程报告中 SLR 的最高 Q 因子。