Physical mechanism of extraordinary electromagnetic transmission in dual-metallic grating structures

Autor:	Qi-Yang Wu, Ya-Xian Fan, Hui-Tian Wang, Da-Jian Shi, Jianping Ding, Jing Chen, Ji Xu, Fang-Fang Ren, Chen Cheng
Rok vydání:	2008
Předmět:	Physics Coupling business.industry Physics::Optics Metallic grating Grating Condensed Matter Physics Electromagnetic radiation Electromagnetic transmission Electronic Optical and Magnetic Materials Mechanism (engineering) Optics Transmission (telecommunications) Oblique incidence business
Zdroj:	Physical Review B. 78
ISSN:	1550-235X 1098-0121
Popis:	Very recently, in a short letter [Appl. Phys. Lett. 91, 111111 (2007)], we outlined some important results of electromagnetic transmission in dual-metallic grating structures composed of two identical single-metallic gratings with periodic subwavelength slit arrays. Here we describe and explain our theoretical study on the propagation property of the electromagnetic radiation in such structures in detail. The results manifest that the longitudinal interval and lateral displacement between the two single-metallic gratings strongly influence the electromagnetic transmission behavior in the dual-metallic grating structures. We discover some interesting phenomena such as the frequency shift and splitting of the high transmission peak, and the transmission suppression over a broad frequency region. We reveal that the coupling between the two single-metallic gratings is responsible for those phenomena. In addition, the case of oblique incidence is also explored.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3c812b105d602346eedd24b529ed73ad https://doi.org/10.1103/physrevb.78.075406 Zobrazit plný text záznamu