Metal heterowaveguide superlattices for a plasmonic analog to electronic Bloch oscillations

被引：33

作者：

Lin, Weihua

Wang, Guo Ping ^{[1
]}

机构：

[1] Wuhan Univ, Minist Educ, Key Lab Acoust & Photon Mat & Devices, Wuhan 430072, Peoples R China

[2] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 14期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2795344

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A metal heterowaveguide superlattice constructed by alternately stacking two metal gap waveguides with gradually changed geometric thicknesses for observing time-resolved plasmon Bloch oscillations (PBOs) is presented. Analytical result from the transfer matrix method reveals the appearance of tilted plasmonic minibands and minigaps, and plasmonic Wannier-Stark ladder in frequency domain, indicating the existence of time-resolved PBO effects in such superlattices. Finite-difference time-domain simulations on the dynamic evolution of plasmon propagation in the superlattices demonstrate the analytical prediction. (c) 2007 American Institute of Physics.

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