Terahertz active spatial filtering through optically tunable hyperbolic metamaterials

被引：48

作者：

Rizza, Carlo ^{[1
,2
]}

Ciattoni, Alessandro ^{[1
]}

Spinozzi, Elisa ^{[3
]}

Columbo, Lorenzo ^{[2
,4
]}

机构：

[1] CNR, SPIN, I-67100 Laquila, Italy

[2] Univ Insubria, Dipartimento Sci & Alta Tecnol, I-22100 Como, Italy

[3] Univ Roma La Sapienza, Dept Informat Engn Elect & Telecommun, I-00184 Rome, Italy

[4] CNR, IFN, I-70126 Bari, Italy

来源：

OPTICS LETTERS | 2012年 / 37卷 / 16期

关键词：

MEDIA;

D O I：

10.1364/OL.37.003345

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We theoretically consider infrared-driven hyperbolic metamaterials able to spatially filter terahertz (THz) radiation. The metamaterial is a slab made of alternating semiconductor and dielectric layers whose homogenized uniaxial response, at THz frequencies, shows principal permittivities of different signs. The gap provided by metamaterial hyperbolic dispersion allows the slab to stop spatial frequencies within a bandwidth tunable by changing the infrared radiation intensity. We numerically prove the device functionality by resorting to full wave simulation coupled to the dynamics of charge carries photoexcited by infrared radiation in semiconductor layers. (C) 2012 Optical Society of America

引用

页码：3345 / 3347

页数：3

共 13 条

[1] Uniaxial epsilon-near-zero metamaterial for angular filtering and polarization control [J].