Tuning Fabry-Perot resonances via diffraction evanescent waves
- 14 August 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 76 (5), 054303
- https://doi.org/10.1103/physrevb.76.054303
Abstract
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 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.
Keywords
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