有限平面金属-绝缘体-金属等离子体波导的表面等离子体模式

Surface plasmon modes of finite, planar, metal-insulator-metal plasmonic waveguides.

作者信息

Chen Jing, Smolyakov Gennady A, Brueck Steven R, Malloy Kevin J

机构信息

Department of Electrical and Computer Engineering, Center for High Technology Materials, University of New Mexico, Albuquerque, New Mexico 87106, USA.

出版信息

Opt Express. 2008 Sep 15;16(19):14902-9. doi: 10.1364/oe.16.014902.

DOI:10.1364/oe.16.014902

PMID:18795027

Abstract

The numerical analysis of finite planar metal-insulator-metal waveguide structures using the transfer-matrix formalism reveals both bound and leaky surface plasmon (SP) modes. The dispersion relations, propagation lengths and confinement factors of these SP modes are presented. The highest energy SP mode consists of non-radiative (bound) and radiative (leaky) portions separated by a spectral gap. The leaky regime is further divided into antenna and reactive mode regions. The antenna mode may be used for both free-space coupling and beam steering devices.

摘要

使用转移矩阵形式对有限平面金属-绝缘体-金属波导结构进行数值分析，揭示了束缚和泄漏表面等离子体（SP）模式。给出了这些SP模式的色散关系、传播长度和限制因子。能量最高的SP模式由被光谱间隙隔开的非辐射（束缚）和辐射（泄漏）部分组成。泄漏区域进一步分为天线模式和电抗模式区域。天线模式可用于自由空间耦合和光束转向装置。