Coherent Visible-Light-Generation Enhancement in Silicon-Based Nanoplasmonic Waveguides via Third-Harmonic Conversion

被引：35

作者：

Sederberg, S. ^{[1
]}

Elezzabi, A. Y. ^{[1
]}

机构：

[1] Univ Alberta, Ultrafast Opt & Nanophoton Res Lab, Edmonton, AB T6G 2V4, Canada

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 22期

基金：

加拿大自然科学与工程研究理事会;

关键词：

3RD HARMONIC-GENERATION; PLASMONIC NANOANTENNAS; NANOPARTICLES; CRYSTALLINE; DISPERSION; EMISSION; CORE;

D O I：

10.1103/PhysRevLett.114.227401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report visible third-harmonic conversion at lambda = 517 nm in subwavelength silicon-based nanoplasmonic waveguides at an unprecedented conversion efficiency of 2.3 x 10(-5). This marks both the highest third-harmonic conversion efficiency in a silicon-based or nanoplasmonic structure and the smallest silicon waveguide structure demonstrated to date. The high conversion efficiency is attributed to tight electric field confinement and strong light-matter coupling arising from surface plasmon modes in the nanoplasmonic waveguide, enabling efficient nonlinear optical mixing over micrometer length scales. The nonresonant geometry of the waveguide enables the entire lambda = 1550 nm femtosecond pulse spectrum to be converted to its third harmonic, which may be easily extended to the entire visible spectrum. We envisage that third-harmonic generation in silicon-based nanoplasmonic waveguides could provide a platform for integrated, broadband visible light sources and entangled triplet photons on future hybrid electronic-silicon photonic chips.

引用

页数：6

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