Double negative refraction in barium substituted magnesium ferrite in the microwave frequency region

2013 ◽  
Author(s):  
P. Chithra lekha ◽  
S. Dinesh Kumar ◽  
N. Yogesh ◽  
V. Subramanian
Keyword(s):  
Negative Refraction ◽  
Microwave Frequency ◽  
Frequency Region ◽  
Double Negative ◽  
Magnesium Ferrite

CLASSICAL ELECTROMAGNETICALLY-INDUCED TRANSPARENCY-LIKE SWITCHING CONTROLLED BY POLARIZATION IN METAMATERIALS

2013 ◽  
Vol 22 (01) ◽  
pp. 1350004 ◽  
Author(s):  
XING RI JIN ◽  
JINWOO PARK ◽  
HAIYU ZHENG ◽  
YOUNGPAK LEE ◽  
JOO YULL RHEE ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetically Induced Transparency ◽  
Microwave Frequency ◽  
Dielectric Substrate ◽  
Frequency Region ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Incident Electromagnetic Wave ◽  
Induced Transparency

The classical electromagnetically-induced transparency (EIT)-like switching in metamaterials was experimentally demonstrated in the microwave-frequency region. The metameterial unit cell consists of two identical split-ring resonators, which are arranged on both sides of a dielectric substrate with 90°-rotation asymmetry. In our scheme, the classical EIT-like switching can be achieved by changing the polarization of the incident electromagnetic wave.

Experiments of Negative-Index Refraction in Optical Frequency Region

2010 ◽  
Vol 437 ◽  
pp. 575-579
Author(s):  
Jia Bi Chen ◽  
Bin Ming Liang ◽  
Da Wei Zhang ◽  
Song Lin Zhuang
Keyword(s):  
Photonic Crystal ◽  
Smart Materials ◽  
Microwave Frequency ◽  
Frequency Region ◽  
Optical Frequency ◽  
Negative Index ◽  
Transmitted Beam ◽  
Negative Index Materials ◽  
New Class ◽  
Significant Attention

Recently, significant attention has been devoted to a new class of smart materials – so-called negative-index materials (NIM). There are some direct experimental demonstrations of NIM in the microwave frequency region, but not in optical frequency region. Here we report a kind of optical negative-index material which is 2D photonic crystal and, by measuring the refractive angle of the transmitted beam through a prism fabricated from this material, we determine the effective n. These experiments directly confirm this material is an optical negative-index one.

Negative refraction of plane electromagnetic waves in non-uniform double-negative media

2019 ◽  
Vol 44 (5) ◽  
pp. 1125 ◽  
Author(s):  
L. A. Pazynin ◽  
V. L. Pazynin ◽  
H. O. Sliusarenko
Keyword(s):  
Electromagnetic Waves ◽  
Negative Refraction ◽  
Double Negative

Double Negative Optical Metamaterial with All-Dielectric Fishnet Structure

2013 ◽  
Vol 873 ◽  
pp. 813-818 ◽  
Author(s):  
Chu Wen Lan ◽  
Xiao Jian Fu ◽  
Xiao Ming Liu ◽  
Bo Li ◽  
Ji Zhou
Keyword(s):  
High Performance ◽  
Figure Of Merit ◽  
Negative Refraction ◽  
Wide Band ◽  
Negative Permeability ◽  
Double Negative ◽  
Negative Index ◽  
Left Handed ◽  
Silicon Based ◽  
Multilayer Dielectric

An all-dielectric fishnet metamaterial (DFM) composed of multilayer dielectric structure with periodically patterned holes is proposed to generate left-handed behavior in optical frequency region. Different from the metallic fishnet negative index metamaterial realized by coupling the neighbouring functional layers along the propagation direction, this DFM owes its simultaneous negative permeability and permittivity to the hybrid coupled resonances in the same layer. Based on this configration, a wide-band and polarization-independent negative refraction with maximum figure of merit as large as 13.85 is obtained by a silicon-based DFM at 450 nm wavelength. Simple and easy to fabricate, this concept is believed to provide an alternative route to realize high-performance negative index metamateirals at optical frequencies.

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