Enhanced second-harmonic generation from double resonant plasmonic antennae

被引：218

作者：

Thyagarajan, Krishnan ^{[1
]}

Rivier, Simon ^{[1
]}

Lovera, Andrea ^{[1
]}

Martin, Olivier J. F. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol Lausanne EPFL, Nanophoton & Metrol Lab NAM, CH-1015 Lausanne, Switzerland

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 12期

基金：

瑞士国家科学基金会;

关键词：

NONLINEAR-OPTICAL RESPONSE; GOLD NANOPARTICLES; NANOANTENNAS; NANOSTRUCTURES; SCATTERING; SYMMETRY;

D O I：

10.1364/OE.20.012860

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a novel plasmonic antenna geometry - the double resonant antenna (DRA) - that is optimized for second-harmonic generation (SHG). This antenna is based on two gaps coupled to each other so that a resonance at the fundamental and at the doubled frequency is obtained. Furthermore, the proximity of the localized hot spots allows for a coupling and spatial overlap between the two field enhancements at both frequencies. Using such a structure, both the generation of the second-harmonic and its re-emission into the far-field are significantly increased when compared with a standard plasmonic dipole antenna. Such DRA are fabricated in aluminium using electron beam lithography and their linear and nonlinear responses are studied experimentally and theoretically. (c) 2012 Optical Society of America

引用

页码：12860 / 12865

页数：6

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