Microwave Quantitative NDE Technique for Dielectric Slab Thickness Estimation Using the Music Algorithm

2007 ◽  
Author(s):  
M. A. Abou-Khousa ◽  
R. Zoughi
Keyword(s):  
Slab Thickness ◽  
Dielectric Slab ◽  
Music Algorithm ◽  
Thickness Estimation ◽  
Quantitative Nde

scholarly journals Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids

Micromachines ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 781
Author(s):  
Reyhaneh Jannesari ◽  
Gerald Pühringer ◽  
Thomas Grille ◽  
Bernhard Jakoby
Keyword(s):  
Photonic Crystal ◽  
Evanescent Field ◽  
Slab Thickness ◽  
Photonic Crystal Waveguide ◽  
Dielectric Slab ◽  
Plane Wave Expansion ◽  
Highly Sensitive ◽  
Center Position ◽  
Sensitive Sensor ◽  
Difference Time

The design and modeling of a highly sensitive sensor based on a slot photonic crystal waveguide (slot-PCWG) is presented. The structure consists of cylindrical air rods drilled in a dielectric slab on a triangular lattice, which are filled with SiO2. The waveguide is formed by removing elements from the regular photonic crystal grid in a row, and embedding a slot in the center position. This concept allows for a vast enhancement of the evanescent field ratio, leading to a strong overlap between the field of the waveguide mode and the analyte. In the present work, we show that the sensitivity at the constant slab thickness of the slot-PCWG modes is greatly enhanced, up to a factor of 7.6 compared with the corresponding PCWG modes or Si-slab WGs. The finite-difference time-domain (FDTD) technique and plane wave expansion (PWE) methods were used to study the dispersion and profile of the PCWG mode. The simulation results show the potential of this design, which will be fabricated and tested in the following steps of the project.

Reflection and transmission from left-handed material structures using Lorentz and Drude medium models

2015 ◽  
Vol 23 (3) ◽  
Author(s):  
S.A. Taya ◽  
D.M. El−Amassi
Keyword(s):  
Slab Thickness ◽  
Band Pass Filter ◽  
Angle Of Incidence ◽  
Dielectric Slab ◽  
Electric Permittivity ◽  
Reflection And Transmission ◽  
Pass Filter ◽  
Transmission Coefficients ◽  
Left Handed ◽  
Band Pass

AbstractThe present article investigates theoretically the refection and transmission through a lossless dielectric slab embedded between two semi−infinite left−handed materials (LHMs) in which the electric permittivity and magnetic permeability are simultaneously negative. The LHM is assumed to be dispersive according to Lorentz as well as Drude medium model. The reflection and transmission coefficients are studied with the angle of incidence, frequency and slab thickness. The effect of the damping frequency is also investigated. It is found that the damping frequency has an insignificant effect on reflected, transmitted and loss powers. Band pass filter is one of the possible applications of the proposed structure.

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