Collective coherent scattering at the surface of a plasmonic nanoparticle array is shown to induce tunable transparency windows at the localized plasmon band. Broadband phase measurements show that the enhanced transmission is accompanied by a large anomalous dispersion, which leads to a group delay as large as $\sim 8\mathrm{fs}$ within only 40 nm thick sample. This effect occurs over a wide tunable spectral range of $\sim 200\mathrm{nm}$, and appears for two distinct counter‐propagating surface waves. The experimental observations are in good agreement with calculations based on coupled dipole approximation (CDA) and with finite‐difference time‐domain (FDTD) simulations. This study opens the door for implementation in the fields of sensing, displays, optical buffering, tunable filtering, and nonlinear optics.

中文翻译：

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在等离振子表面近红外可调谐表面晶格诱导的透明度。

在等离激元纳米粒子阵列的表面的集体相干散射显示出在局部等离激元带上引起可调节的透明窗口。宽带相位测量表明，增强的传输伴随着较大的异常色散，这导致了高达$〜8\mathrm{fs}$在仅40 nm厚的样品中。这种影响发生在宽范围的可调光谱范围内。$〜200\mathrm{纳米}$，并出现在两个不同的反向传播的表面波中。实验观察结果与基于偶极耦合近似（CDA）的计算以及有限差分时域（FDTD）模拟的结果非常吻合。这项研究为在传感，显示，光学缓冲，可调滤波和非线性光学领域的实施打开了大门。