Multiple excitations of a surface-plasmon-polariton wave guided by a columnar thin film deposited on a metal grating

被引：8
作者：
Chiadini, Francesco [1 ]
Fiumara, Vincenzo [2 ]
Scaglione, Antonio [1 ]
Lakhtakia, Akhlesh [3 ]
机构：
[1] Univ Salerno, Dept Ind Engn, I-84084 Fisciano, SA, Italy
[2] Univ Basilicata, Sch Engn, I-85100 Potenza, Italy
[3] Penn State Univ, Dept Engn Sci & Mech, Nanoengineered Metamat Grp, University Pk, PA 16802 USA
来源：
OPTICAL ENGINEERING | 2014年 / 53卷 / 12期
关键词：
columnar thin film; metal grating; rigorous coupled-wave approach; surface-plasmon-polariton; SILVER;
D O I：
10.1117/1.OE.53.12.127105
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Surface-plasmon-polariton (SPP) wave excitation in a composite structure obtained by depositing a columnar thin film (CTF) on a metal (silver) substrate decorated periodically by an array of rectangular grooves was analyzed using the rigorous coupled-wave approach. The SPP wave is excited as a Floquet harmonic of different orders by light incident from different directions, the incidence plane being the same as the grating plane. But, in some instances, the SPP wave appears to be excited as a doublet, i.e., a Floquet harmonic of the same order at two closely spaced angles of incidence, the excitation being less efficient for one angle of incidence than for the other. The characteristics of the SPP wave are affected by the vapor incidence angle chosen to deposit the CTF. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：6
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