Tuning Fabry-Perot resonances via diffraction evanescent waves
Tuning Fabry-Perot resonances via diffraction evanescent waves
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DOI：
10.1103/physrevb.76.054303
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发表时间：
2007-08-01
影响因子：
3.7
通讯作者：
Sheng, Ping
中科院分区：
文献类型：
--
作者：
Hou, Bo;Mei, Jun;Sheng, Ping
通过研究声波和电磁波通过具有不同通道长度的亚波长孔或狭缝的周期性阵列的传输，我们从实验和理论上证明了衍射倏逝波可以在调谐法布里-珀罗（FP）谐振中发挥重要作用。特别地，在远低于瑞利-伍德极限的波长处可以存在总透射峰，并且对于比半波长薄16%的信道长度可以发生FP谐振。此外，FP谐振条件可以通过孔的周期性和面积分数来调谐。作为周期性和板厚度之间的比率的函数，FP共振平滑地链接到由周期性结构因子引起的表面波状模式。
By studying acoustic and electromagnetic wave transmission through a periodic array of subwavelength holes or slits with various channel lengths, we demonstrate both experimentally and theoretically that diffraction evanescent waves can play an important role in tuning the Fabry-Perot (FP) resonances. In particular, there can be total transmission peaks at wavelengths much below that of the Rayleigh-Wood limit, and FP resonances can occur for channel length similar to 16% thinner than the half wavelength. In addition, the FP resonance condition can be tuned via both the periodicity and area fraction of holes. As a function of the ratio between the periodicity and plate thickness, the FP resonance is smoothly linked to the surface-wave-like mode induced by the periodic structure factor.