Surface plasma waves (SPWs) excited by illumination of 2-dimensional superstructured metal photonic crystals (SMPCs) are investigated with extraordinary optical transmission (EOT). An m × m lattice of holes (m = 3 with the period p of 3 μm) fabricated in an Au film atop a GaAs substrate (refractive index n_d), referred to as a basis plasmonic antenna (BPA), forms an SMPC that consists of 24 × 24 BPAs with varying spacing between BPAs, d. Two categories of d are examined: κ = d/p = i (i an integer), where SPWs generated at each BPA interfere constructively and κ ≠ i (<1), where the interference leads to drastic changes in the EOT. In the first category, the EOT associated with the fundamental SPW wavelength, T₁, decreases with increasing κ, but has an almost invariant peak wavelength, λ₁, at ∼10.1 μm (≅n_dp), as expected. In the second category, however, the λ₁ for the dominant EOT peak clearly shows a red-shift to ∼12 μm with T₁ reduced to ∼0 at κ = 0.5, and T₁ has a damped oscillatory dependence on κ. The shift implies strong plasmonic interference between BPAs that follows ∼n_dp(m + κ)/H with the integral harmonic order of the Fourier transform of the SMPC, H. This rescaling of the geometric pattern, incommensurate to the BPA period, accompanies the EOT degraded with the dipole deviation from individual holes that provides important relations for the crosstalk among antennas in plasmonic circuits.

中文翻译：

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超结构化金属光子晶体中的等离子干扰

研究了二维超结构金属光子晶体（SMPC）的照明激发下的表面等离子体波（SPW）和非凡的光学传输（EOT）。在GaAs衬底（折射率n _d）上的Au膜中制造的m × m的孔晶格（m = 3，周期p为3μm ），被称为基本等离激元天线（BPA），形成了一个SMPC，由24×24个BPA组成，两个BPA之间的间距不同d。检查了d的两个类别：κ= d / p = i（i整数），其中每个BPA生成的SPW产生相长干涉，并且κ≠ i（<1），其中干涉导致EOT发生急剧变化。在第一类中，与基本SPW波长，相关联的EOT Ť ₁，随着κ降低，但具有几乎不变的峰值波长，λ ₁，在~10.1微米（≅ Ñ _d p），如所预期。在第二类中，但是，λ ₁为主导EOT峰清楚地显示出红移到〜12微米与Ť ₁在κ减小到〜0 = 0.5，和Ť ₁对κ具有衰减的振荡依赖性。移位意味着如下BPAS之间的强等离子体激元干扰〜Ñ _d p（米+κ）/ ħ与傅立叶变换的积分谐波阶变换的SMPC，的ħ。几何图案的这种缩放，与BPA周期不相称，伴随着EOT的恶化，偶极子偏离各个孔，这为等离激元电路中天线之间的串扰提供了重要的关系。