Electro-Optic Effects in Colloidal Dispersion of Metal Nano-Rods in Dielectric Fluid

被引：19

作者：

Golovin, Andrii B. ^{[1
]}

Xiang, Jie ^{[1
,2
]}

Park, Heung-Shik ^{[1
,2
]}

Tortora, Luana ^{[1
]}

Nastishin, Yuriy A. ^{[1
]}

Shiyanovskii, Sergij V. ^{[1
]}

Lavrentovich, Oleg D. ^{[1
,2
]}

机构：

[1] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA

[2] Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA

来源：

MATERIALS | 2011年 / 4卷 / 02期

关键词：

optical metamaterial; dielectrophoretic effect; gold nano-rods; gradient of refractive index; field induced birefringence; optical cloak; liquid crystal formed by metal particles; TRANSFORMATION-OPTICS; METAMATERIAL; MANIPULATION; ALIGNMENT; CLOAK;

D O I：

10.3390/ma4020390

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In modern transformation optics, one explores metamaterials with properties that vary from point to point in space and time, suitable for application in devices such as an "optical invisibility cloak" and an "optical black hole". We propose an approach to construct spatially varying and switchable metamaterials that are based on colloidal dispersions of metal nano-rods (NRs) in dielectric fluids, in which dielectrophoretic forces, originating in the electric field gradients, create spatially varying configurations of aligned NRs. The electric field controls orientation and concentration of NRs and thus modulates the optical properties of the medium. Using gold (Au) NRs dispersed in toluene, we demonstrate electrically induced change in refractive index on the order of 0.1.

引用

页码：390 / 416

页数：27

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