Gain-assisted propagation of electromagnetic energy in subwavelength surface plasmon polariton gap waveguides

被引：126

作者：

Maier, SA ^{[1
]}

机构：

[1] Univ Bath, Dept Phys, Ctr Photon & Photon Mat, Bath BA2 7AY, Avon, England

来源：

OPTICS COMMUNICATIONS | 2006年 / 258卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

surface plasmon polaritons; metal gap waveguides; active media; integrated optics;

D O I：

10.1016/j.optcom.2005.07.064

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The propagation of electromagnetic energy via coupled surface plasmon polariton modes in a metal-insulator-metal heterostructure is analyzed analytically for a core material exhibiting optical gain. It is shown that a sufficiently large gain can completely compensate for the absorption losses due to energy dissipation in the metallic boundaries, enabling long-range transport with a confinement below the diffraction limit for on-chip switching and sensing applications. For a free-space wavelength of 1500 nm, lossless propagation in a gold-semiconductor-gold waveguide with a core size of 50 nm is predicted for a gain coefficient gamma = 4830 cm(-1) comparable to that of semiconductor gain media. The gain requirements decrease with the use of low-index nanocrystal-doped glasses or polymers as core materials. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：295 / 299

页数：5

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