Modified method of surface plasmons in metal superlattices

doi:10.1088/1674-1056/24/5/057301

Abstract We present a modified method to solve the surface plasmons (SPs) of semi-infinite metal/dielectric superlattices and predicted new SP modes in physics. We find that four dispersion-equation sets and all possible SP modes are determined by them. Our analysis and numerical calculations indicate that besides the SP mode obtained in the original theory, the other two SP modes are predicted, which have either a positive group velocity or a negative group velocity. We also point out the possible defect in the previous theoretical method in accordance to the linear algebra principle.

Keywords: surface plasmon dispersion equations metal-layer arrays metal/dielectric superlattices

Received: 28 August 2014
Revised: 24 December 2014
Accepted manuscript online:

PACS:	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	73.21.Cd	(Superlattices)
	78.67.Pt	(Multilayers; superlattices; photonic structures; metamaterials)
	42.70.Qs	(Photonic bandgap materials)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11074061).

Corresponding Authors: Wang Xuan-Zhang
E-mail: xzwang696@126.com

About author: 73.20.Mf; 73.21.Cd; 78.67.Pt; 42.70.Qs

Cite this article:

Zhang Yu-Liang (张宇亮), Wang Xuan-Zhang (王选章) Modified method of surface plasmons in metal superlattices 2015 Chin. Phys. B 24 057301

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