Tucker Eric, D' Archangel Jeffrey, Raschke Markus B, Boreman Glenn
Opt Express. 2015 May 4;23(9):10974-85. doi: 10.1364/OE.23.010974.
Mid-infrared scattering scanning near-field optical microscopy, in combination with far-field infrared spectroscopy, and simulations, was employed to investigate the effect of mutual-element coupling towards the edge of arrays of loop elements acting as frequency selective surfaces (FSSs). Two different square loop arrays on ZnS over a ground plane, resonant at 10.3 µm, were investigated. One array had elements that were closely spaced while the other array had elements with greater inter-element spacing. In addition to the dipolar resonance, we observed a new emergent resonance associated with the edge of the closely-spaced array as a finite size effect, due to the broken translational invariance.
中红外散射扫描近场光学显微镜结合远场红外光谱和模拟，用于研究相互耦合的元素对作为频率选择表面（FSS）的环形元素阵列边缘的影响。研究了在接地平面上的ZnS上的两种不同的方形环形阵列，它们在10.3 µm处共振。一种阵列的元素间距紧密，而另一种阵列的元素间距较大。除了偶极共振外，由于平移不变性的破坏，我们观察到一种与紧密间隔阵列边缘相关的新出现的共振，这是一种有限尺寸效应。
