Dielectric Anomalies in La Modified PbTiO3 Ferroelectric Ceramics in the Microwave Frequency Region

2003 ◽  
Vol 294 ◽  
pp. 25-31 ◽  
Author(s):  
J. De Los Santos Guerra ◽  
J. A. Eiras
Keyword(s):  
Microwave Frequency ◽  
Frequency Region ◽  
Ferroelectric Ceramics

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.

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