Study on the Dispersion Characteristics of Surface TM Modes in Hollow Slab Waveguide with a Left-Handed Material Cover

2013 ◽  
Vol 710 ◽  
pp. 178-181
Author(s):  
Su Ping Li ◽  
Yan Chen ◽  
Wei Wu
Keyword(s):  
Dispersion Relation ◽  
Propagation Constant ◽  
Existence Condition ◽  
Slab Waveguide ◽  
Dispersion Characteristics ◽  
Dielectric Slab ◽  
The Core ◽  
Left Handed ◽  
Normalized Parameters ◽  
Asymmetry Measure

The dispersion characteristics of surface TM modes in a hollow slab waveguide which consists of the core and substrate of right-handed material (RHM) and the cover of left-handed material (LHM) are investigated. Normalized frequency, normalized propagation constant and asymmetry measure are introduced to the left-handed material hollow slab waveguide. The dispersion relation is derived by using these normalized parameters, and universal dispersion curves are obtained by solving transcendental dispersion equations analytically. Existence condition and other dispersion characteristics of guided surface TM modes have been discussed in detail for different permittivity of three layers for this left-handed material hollow dielectric slab waveguide.

Dispersion Characteristic of the Symmetric Slab Waveguide with Chiral Negative Refractive Medium

2014 ◽  
Vol 571-572 ◽  
pp. 915-919
Author(s):  
Xiao Xue Xu ◽  
Zhong Yin Xiao ◽  
Quan Wen Ma ◽  
Xiao Long Ma ◽  
De Jun Liu ◽  
...  
Keyword(s):  
Maxwell Equations ◽  
Dispersion Characteristic ◽  
Constitutive Relations ◽  
Great Influence ◽  
Zero Order ◽  
Slab Waveguide ◽  
Order Mode ◽  
The Core ◽  
Left Handed ◽  
Refractive Medium

According to Maxwell equations and constitutive relations in chiral medium, the dispersion characteristic of the symmetric slab waveguide with chiral negative refractive medium is studied. The dispersion equations expressed in the normalized parameter are deduced in the slab waveguide. The numerical results show that the chiral parameter has great influence on the dispersion characteristic of slab waveguide. When the relative chiral parameter is about 0.0477, the zero order mode of left-handed polarized wave disappears. While it is greater than 1, the core becomes chiral negative refractive medium and the zero order mode disappears. In addition, compared with the general chiral waveguide, the tendency of dispersion curves in slab waveguide with chiral negative refractive medium is also analyzed.

scholarly journals Near-Zero-Refractive-Index Structure at Optical Frequencies

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Hassan S. Ashour
Keyword(s):  
Refractive Index ◽  
Dispersion Relation ◽  
Power Flow ◽  
Dielectric Material ◽  
Index Structure ◽  
Slab Waveguide ◽  
Slab Thickness ◽  
Thickness Increase ◽  
Modal Dispersion ◽  
Left Handed

We have used a new class of left-handed materials, which uses 3D nanospheres distributed in loops in the dielectric host material. These 3D nanospheres loops give rise to negative effective permeability and permeability at Terahertz (optical) frequencies. The modal dispersion relation for Terahertz TE surface waves has been derived for a slab waveguide constructed from a dielectric material slab sandwiched between two thick layers of Terahertz left-handed material (LHM). The modal dispersion relation and the power flow were numerically solved for a given set of parameters: dielectric slab thickness, the operating frequency, mode order, and the power flow and extinction in the structure. The real part of the effective refractive index exhibits near-zero values, with small extinction coefficient values. Besides that, the power flow in the dielectric core increased with slab thickness increase and the power attenuation decreased with thickness increase.

Slab waveguide with air core layer and anisotropic left-handed material claddings as a sensor

2014 ◽  
Vol 22 (4) ◽  
Author(s):  
S. Taya
Keyword(s):  
Core Layer ◽  
Sensitivity Enhancement ◽  
Core Region ◽  
Slab Waveguide ◽  
Strong Concentration ◽  
The Core ◽  
Left Handed ◽  
Sensing Applications ◽  
Air Core ◽  
Sensitivity Improvement

AbstractA three-layer slab waveguide with air core layer and anisotropic left-handed material claddings is investigated for sensing applications. Different from the waveguide mode sensors and surface plasmon resonance sensors in which the analyte is placed in the evanescent field region, the proposed sensor contains the sample in the core region that supports the oscillating field. Due to the strong concentration of the electromagnetic field in the analyte medium, the proposed device exhibits unusual sensitivity enhancement. The simulations revealed that the sensitivity improvement of TE3 mode compared to conventional evanescent wave sensor is approximately a factor of 20.

scholarly journals Orthogonality relations among modes in left-handed materials slab waveguide

2006 ◽  
Vol 55 (4) ◽  
pp. 1846
Author(s):  
Zhang Gao-Ming ◽  
Peng Jing-Cui ◽  
Jian Zhi-Jian ◽  
Huang Xiao-Yi
Keyword(s):  
Slab Waveguide ◽  
Left Handed ◽  
Orthogonality Relations
Sign in / Sign up

Export Citation Format

Share Document