Nanoscale optical field localization by resonantly focused plasmons

被引：25

作者：

Feng, Liang ^{[1
]}

Van Orden, Derek ^{[2
]}

Abashin, Maxim ^{[1
]}

Wang, Qian-Jin ^{[3
]}

Chen, Yan-Feng ^{[3
]}

Lomakin, Vitaliy ^{[1
]}

Fainman, Yeshaiahu ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 06期

关键词：

SURFACE-PLASMONS;

D O I：

10.1364/OE.17.004824

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We experimentally demonstrate use of plasmonic resonant phenomena combined with strong field localization to enhance efficiency of confining optical fields in a Si waveguide. Our approach utilizes a plasmonic resonant nano-focusing-antenna (RNFA), that simultaneously supports several focusing mechanisms in a single nanostructure, integrated with a lossless Si waveguide utilized with silicon-on-insulator (SOI) technology, to achieve a sub-diffraction limited focusing with a nanoscale (deeply subwavelength) spot size. The metallic RNFA effectively converts an incoming propagating waveguide mode to a localized resonant plasmon mode in an ultrasmall volume in all 3 dimensions. The near-field optical measurements of the fabricated RNFA using heterodyne near-field scanning optical microscope (H-NSOM) validate the theoretical predictions showing strong optical field localization. (C) 2009 Optical Society of America

引用

页码：4824 / 4832

页数：9

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