scholarly journals Design of a Polarization-Independent Dual-Band Electromagnetically Induced Transparency-Like Metamaterial

2019 ◽  
Vol 8 (2) ◽  
pp. 63-70 ◽  
Author(s):  
O. Demirkap ◽  
F. Bagci ◽  
A. E. Yilmaz ◽  
B. Akaoglu
Keyword(s):  
Numerical Methods ◽  
Slow Light ◽  
Ring Resonator ◽  
Electromagnetically Induced Transparency ◽  
Dual Band ◽  
Oblique Angle ◽  
Classical Analog ◽  
Induced Transparency ◽  
Polarization Independent ◽  
Minkowski Fractal

In this study, the classical analog of single and dual-band electromagnetically induced transparency is demonstrated with a four-fold symmetric metamaterial consisting of a Minkowski fractal ring resonator surrounded by a square ring resonator. The proposed metamaterials show high transmission ratios at the polarization independent resonances, as confirmed by the applied two different numerical methods. Delay-bandwidth products are found to be 0.34 and 0.61 at the resonances of the dual-band metamaterial. The peak frequencies and transmission ratios maintain also for oblique angle of incidences. These features of the proposed metamaterials are promising for single and multi-band filtering applications as well as for slow light and sensing devices.

Terahertz polarization-independent electromagnetically-induced transparency structures

2020 ◽  
Vol 34 (16) ◽  
pp. 2050170
Author(s):  
Dandan Sun ◽  
Limei Qi
Keyword(s):  
Slow Light ◽  
Electromagnetically Induced Transparency ◽  
Metal Ring ◽  
Group Index ◽  
Light Effect ◽  
Terahertz Region ◽  
Coupling Behavior ◽  
Potential Applications ◽  
Induced Transparency ◽  
Polarization Independent

Two simple polarization-independent electromagnetically-induced transparency (EIT) metamaterials are numerically and experimentally demonstrated at the terahertz region. The first structure is composed of two metal concentric rings on a substrate, while the second one is composed of one metal ring with a cross in it. The bright–bright coupling behavior appears in the two symmetric polarization-independent EIT structures while it is generally observed in asymmetrically structures. In addition, the large group index is extracted to verify the slow-light effect of the two EIT structures. These simple EIT structures may have potential applications in certain areas, including sensing, slow-light and filtering devices.

A novel reconfigurable electromagnetically induced transparency based on S-PINs

2018 ◽  
Vol 32 (04) ◽  
pp. 1850030 ◽  
Author(s):  
Feng Xue ◽  
Shao-Bin Liu ◽  
Hai-Feng Zhang ◽  
Yong-Diao Wen ◽  
Xiang-Kun Kong ◽  
...  
Keyword(s):  
Slow Light ◽  
Ring Resonator ◽  
Electromagnetically Induced Transparency ◽  
Split Ring Resonator ◽  
Destructive Interference ◽  
Split Ring ◽  
Simple Method ◽  
Strong Phase ◽  
Phase Dispersion ◽  
Induced Transparency

In this paper, a tunable electromagnetically induced transparency (EIT) based on S-PINs is theoretically analyzed. Unit cell of the structure consists of a cutwire (CW), split ring resonator (SRR), and solid state plasma (SS plasma) patches which are composed of S-PIN array. The destructive interference between the CW and SRR results in a narrowband transparency window accompanied with strong phase dispersion. The proposed design can obtain a tunable EIT with different frequencies range from 12.8 GHz to 16.5 GHz in a simple method by switching these S-PINs on or off selectively. The related parameters of the S-PIN such as the size, carrier concentration, and volt-ampere characteristics have been studied theoretically. The interaction and coupling between two resonators are investigated in detail by the analysis of the current distribution and E-field strength as well. The research results provide an effective way to realize reconfigurable compact slow-light devices.

Probing Bloch oscillations using a slow-light sensor

2020 ◽  
Vol 9 (5) ◽  
pp. 243-246
Author(s):  
Pei-Chen Kuan ◽  
Chang Huang ◽  
Shau-Yu Lan
Keyword(s):  
Phase Shift ◽  
Optical Lattice ◽  
Cold Atoms ◽  
Slow Light ◽  
Internal State ◽  
Electromagnetically Induced Transparency ◽  
Bloch Oscillations ◽  
Bloch Oscillation ◽  
Induced Transparency ◽  
Transparency Condition

AbstractWe implement slow-light under electromagnetically induced transparency condition to measure the motion of cold atoms in an optical lattice undergoing Bloch oscillation. The motion of atoms is mapped out through the phase shift of light without perturbing the external and internal state of the atoms. Our results can be used to construct a continuous motional sensor of cold atoms.

Enhanced slow light in superconducting electromagnetically induced transparency metamaterials

2013 ◽  
Vol 26 (7) ◽  
pp. 074004 ◽  
Author(s):  
B B Jin ◽  
J B Wu ◽  
C H Zhang ◽  
X Q Jia ◽  
T Jia ◽  
...  
Keyword(s):  
Slow Light ◽  
Electromagnetically Induced Transparency ◽  
Induced Transparency

scholarly journals Dual-Tunable Polarization Insensitive Electromagnetically Induced Transparency in Metamaterials

2021 ◽  
Author(s):  
Renxia Ning ◽  
Zhiqiang Xiao ◽  
Zhenhai Chen ◽  
Wei Huang
Keyword(s):  
Vanadium Dioxide ◽  
Mode Coupling ◽  
Slow Light ◽  
Chemical Potential ◽  
Electromagnetically Induced Transparency ◽  
Dark Mode ◽  
Potential Applications ◽  
Polarization Insensitive ◽  
Terahertz Devices ◽  
Induced Transparency

AbstractA multilayer structure of a square ring of graphene with nesting vanadium dioxide (VO2) was investigated in this study. This structure exhibits electromagnetically induced transparency (EIT), which stems from a bright mode coupling with a dark mode. The permittivity values of graphene and VO2 can be modulated via chemical potential and temperature, respectively. The EIT effect can be tuned based on the chemical potential of graphene and temperature of VO2, resulting in a dual-tunable EIT effect. Simulation results confirmed that this dual-tunable EIT phenomenon is insensitive to polarization. These results may have potential applications in terahertz devices, such as slow light devices, switching devices, and sensors.

Sign in / Sign up

Export Citation Format

Share Document