Journal
OPTICS EXPRESS
Volume 18, Issue 17, Pages 17876-17882Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.017876
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Funding
- Japan Society for the Promotion of Science (JSPS) [20246022]
- Grants-in-Aid for Scientific Research [20246022] Funding Source: KAKEN
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We theoretically predicted the existence of an anomalous optical transmittance dip, which must be observed for a metamaterial structure with two metallic slabs with cut-through slit arrays of a constant period d under a normal incident condition. By changing the relative lateral displacement l between the two slabs, the dip frequency varies across that of a so-called Rayleigh-Wood's (RW) anomaly frequency. The mechanism of this anomaly is quite different from that of the RW anomaly and interpreted in terms of the interference between the propagating and evanescent waves. For the present double-layered system, furthermore, it is suggested that the RW anomaly vanishes for l = 0 and d/2. In experiments in the terahertz region, we observe that the fundamental features agree with these theoretical predictions. (C) 2010 Optical Society of America
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