Abstract
In the traditional long-range surface plasmon geometry, an ultrathin metal film is sandwiched between two layers having identical dielectric constants. Here we demonstrate the long-range surface plasmon polariton (LRSPP) properties for a new structure where a thin layer with a dielectric constant exceeding that of the surroundings is inserted within the sandwich, provided the layer thickness d satisfies the condition where is the component of the guide wavevector perpendicular to the layer and m is an integer. The resulting plasmon modes have smaller losses and nearly the same phase velocity as the original LRSPP. This provides a strategy to support silver films having thicknesses of of nanometers to create plasmonic devices for sensor applications.
© 2011 Optical Society of America
Full Article | PDF ArticleMore Like This
Sonia M. García-Blanco, Markus Pollnau, and Sergey I. Bozhevolnyi
Opt. Express 19(25) 25298-25310 (2011)
Valentyn S. Volkov, Zhanghua Han, Michael G. Nielsen, Kristjan Leosson, Hamid Keshmiri, Jacek Gosciniak, Ole Albrektsen, and Sergey I. Bozhevolnyi
Opt. Lett. 36(21) 4278-4280 (2011)
Fang Liu, Ruiyuan Wan, Yidong Huang, and Jiangde Peng
Opt. Lett. 34(17) 2697-2699 (2009)