Bowtie plasmonic quantum cascade laser antenna

被引：140
|
作者：
Yu, Nanfang
Cubukcu, Ertugrul
Diehl, Laurent
Bour, David
Corzine, Scott
Zhu, Jintian
Hoefler, Gloria
Crozier, Kenneth B.
Capasso, Federico [1 ]
机构：
[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
[2] Agilent Labs, Palo Alto, CA 94304 USA
[3] Bridgelux Inc, Sunnyvale, CA 94089 USA
[4] Infinera HQ, Sunnyvale, CA 94089 USA
[5] Argos Tech LLC, Santa Clara, CA 95051 USA
来源：
OPTICS EXPRESS | 2007年 / 15卷 / 20期
关键词：
D O I：
10.1364/OE.15.013272
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report a bowtie plasmonic quantum cascade laser antenna that can confine coherent mid-infrared radiation well below the diffraction limit. The antenna is fabricated on the facet of a mid-infrared quantum cascade laser and consists of a pair of gold fan-like segments, whose narrow ends are separated by a nanometric gap. Compared with a nano-rod antenna composed of a pair of nano-rods, the bowtie antenna efficiently suppresses the field enhancement at the outer ends of the structure, making it more suitable for spatially-resolved high-resolution chemical and biological imaging and spectroscopy. The antenna near field is characterized by an apertureless near-field scanning optical microscope; field confinement as small as 130 nm is demonstrated at a wavelength of 7.0 mu m. (C) 2007 Optical Society of America.
引用
收藏
页码：13272 / 13281
页数：10
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