Dual refractions in metal nanorod-based metamaterials

被引：7

作者：

Yan, Changchun ^{[1
]}

Zhang, Dao Hua ^{[1
]}

Li, Dongdong ^{[1
]}

Zhang, Yuan ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

JOURNAL OF OPTICS | 2010年 / 12卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

nanorod arrays; dual refractions; negative refraction; NEGATIVE-INDEX METAMATERIAL; VISIBLE WAVELENGTHS; MEDIA; PERMITTIVITY; DIELECTRICS; SUPERLENS; LIGHT;

D O I：

10.1088/2040-8978/12/6/065102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the dual refractions in the metamaterials composed of metal nanorod arrays and alumina at visible wavelengths. By simulating the energy stream distributions of the nanorod arrays for H-polarized waves, we find that the dual refractions exist in the transition region starting from a critical ratio of the wavelength in free space to the neighbor nanorod distance. The critical ratio is a function of the radius of nanorods and the material used but does not vary with incident wavelengths. The dual refractions can serve as a criterion for applicability of the effective medium theory in the metamaterials based on nanorod arrays.

引用

页数：7

共 38 条

[1] Backward waves and negative refraction in uniaxial dielectrics with negative dielectric permittivity along the anisotropy axis [J].

Belov, PA .

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2003, 37 (04) :259-263

[2] Dual-band negative index metamaterial: double negative at 813nm and single negative at 772nm [J].

Chettiar, Uday K. ;

Kildishev, Alexander V. ;

Yuan, Hsiao-Kuan ;

Cai, Wenshan ;

Xiao, Shumin ;

Drachev, Vladimir P. ;

Shalaev, Vladimir M. .

OPTICS LETTERS, 2007, 32 (12) :1671-1673

[3] Simultaneous negative phase and group velocity of light in a metamaterial [J].

Dolling, G ;

Enkrich, C ;

Wegener, M ;

Soukoulis, CM ;

Linden, S .

SCIENCE, 2006, 312 (5775) :892-894

[4] Realization of a three-functional-layer negative-index photonic metamaterial [J].

Dolling, G. ;

Wegener, M. ;

Linden, S. .

OPTICS LETTERS, 2007, 32 (05) :551-553

[5] Negative-index metamaterial at 780 nm wavelength [J].

Dolling, G. ;

Wegener, M. ;

Soukoulis, C. M. ;

Linden, S. .

OPTICS LETTERS, 2007, 32 (01) :53-55

[6] Low-loss negative-index metamaterial at telecommunication wavelengths [J].

Dolling, Gunnar ;

Enkrich, Christian ;

Wegener, Martin ;

Soukoulis, Costas M. ;

Linden, Stefan .

OPTICS LETTERS, 2006, 31 (12) :1800-1802

[7] Dielectric photonic crystal as medium with negative electric permittivity and magnetic permeability [J].

Efros, AL ;

Pokrovsky, AL .

SOLID STATE COMMUNICATIONS, 2004, 129 (10) :643-647

[8] Sub-diffraction-limited optical imaging with a silver superlens [J].

Fang, N ;

Lee, H ;

Sun, C ;

Zhang, X .

SCIENCE, 2005, 308 (5721) :534-537

[9] Electromagnetic wave propagation in two-dimensional photonic crystals: A study of anomalous refractive effects [J].

Foteinopoulou, S ;

Soukoulis, CM .

PHYSICAL REVIEW B, 2005, 72 (16)

[10] Refraction in media with a negative refractive index [J].

Foteinopoulou, S ;

Economou, EN ;

Soukoulis, CM .

PHYSICAL REVIEW LETTERS, 2003, 90 (10) :4

← 1 2 3 4 →