Enhanced spontaneous emission inside hyperbolic metamaterials

被引：75
作者：
Ferrari, Lorenzo [1 ]
Lu, Dylan [2 ]
Lepage, Dominic [2 ]
Liu, Zhaowei [1 ,2 ]
机构：
[1] Univ Calif San Diego, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 04期
关键词：
FLUORESCENCE; MOLECULES;
D O I：
10.1364/OE.22.004301
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Hyperbolic metamaterials can enhance spontaneous emission, but the radiation-matter coupling is not optimized if the light source is placed outside such media. We demonstrate a 3-fold improvement of the Purcell factor over its outer value and a significant enlargement in bandwidth by including the emitter within a Si/Ag periodic multilayer metamaterial. To extract the plasmonic modes of the structure into the far field we implement two types of 1D grating with triangular and rectangular profile, obtaining a 10-fold radiative enhancement at visible frequencies. (C) 2014 Optical Society of America
引用
收藏
页码：4301 / 4306
页数：6
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