Optical modulation based on tunable light absorption and amplification in metasurfaces coupled with gain medium

被引：6

作者：

Vasic, Borislav ^{[1
]}

Gajic, Rados ^{[1
]}

机构：

[1] Univ Belgrade, Inst Phys Belgrade, Ctr Solid State Phys & New Mat, Graphene Lab GLAB, Pregrevica 118, Belgrade 11080, Serbia

来源：

OPTICS LETTERS | 2017年 / 42卷 / 11期

关键词：

MAGNETIC METAMATERIALS; LASING SPASER; RESONATORS;

D O I：

10.1364/OL.42.002181

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

While previous tunable metasurfaces were based mainly on tuning of dielectric permittivity or losses in associated tunable elements, here we propose gain-assisted tunable metasurfaces as optical modulators with high ON-OFF ratio. They consist of a dye-doped film placed within metalinsulator-metal (MIM) cavities. Plasmonic modes with enhanced electric field significantly enhance both absorption and emission of light by dye molecules. As a result, it is possible to achieve the perfect absorption in MIM cavities with zero reflection, as well as to compensate losses thus achieving unit reflection. As a result, the achievable ON/OFF ratio is more than 100. (C) 2017 Optical Society of America

引用

页码：2181 / 2184

页数：4

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