J. Toney, J. Retz, V. Stenger, A. Pollick, P. Pontius, S. Sriram
SRICO, Inc., Columbus, OH, USA
This paper presents techniques for modeling annealed proton exchange (APE) and reverse proton exchange (RPE) waveguides in periodically poled lithium niobate for application to optical frequency conversion. A combination of time-dependent diffusion modeling and electromagnetic mode analysis using the RF module are used to predict the relationship between the poling period and the second harmonic ...
G. Latha, P. Nair
SSN College of Engineering, Chennai, Tamil Nadu, India
In a solid core PCF, structural parameters and the number of rings in the cladding region decide confinement losses, dispersion coefficients as well as bending losses. This paper evaluates some of commercially available solid core photonic crystal fibers. The dispersion coefficients and sensitivity of these fibers are estimated using COMSOL Multiphysics®, and compared with the theoretical values ...
C. T. Nadovich ,
 Lafayette College, Easton, PA, USA
The use of grating couplers to couple conventionally phased and polarized light near vertically in and out of optical slab or film waveguides  represents an attractive method to interface optical fiber to photonic ICs. Previously developed grating coupler designs use transversely uniform grating structures matched to conventional scalar fiber modes. The performance of these geometries can be ...
Prof. Dr.-Ing. habil. A. K. Palit ,
 ZF-Lemfoerder Electronic GmbH, ZF-Friedrichshafen AG. Group, Espelkamp, Germany
Introduction: RFID system uses a Transponder and the near field communication (NFC) antenna and a matching circuit (Figure-1) in which at least latter two must be optimally designed for a higher efficiency. Typically, RFID antennas are flat inductive coils with 2 to 4 turns and are printed directly on the PCB. The larger antenna size implies larger operating distance whereas, the number of ...
H. Arab, F. Afshar, C. Akyel
École Polytechnique de Montréal, Montréal, QC, Canada
Department of Electrical and Computer Engineering, McGill University, Montréal, QC, Canada
In this project a two dimensional second order nodal and linear edge elements programming model for homogeneous waveguide is developed and simulated in MATLAB® software Environment. The objective is to reduce or eliminate spurious solutions and to cater for any arbitrarily shaped waveguides using triangular edge elements. The formulation is developed using the E-Field and to make use of the ...
J. Grover, Dr. A. Gupta
Birla Institute of Technology and Science, Pilani-Pilani Campus,Rajasthan ,India
In high-speed digital design, strong electromagnetic coupling exists between adjacent transmission lines. This manifests itself in the form of crosstalk voltage induced on either line. Crosstalk is modeled in terms of capacitance and inductance matrices which are extracted using COMSOL Multiphysics®. Further, trends of crosstalk are observed with variations in dielectric constant of substrate, ...
M. Mattheakis, C. Athanasopoulos, G. P. Tsironis
University of Crete, Heraklion, Greece
We present numerical simulations for the propagation of surface plasmon polaritons in a dielectric-metal-dielectric waveguide using COMSOL Multiphysics® software. We show that the use of an active dielectric with gain that compensates metal absorption losses enhances substantially plasmon propagation. Furthermore, the introduction of the active material induces, for a specific gain value, a ...
G. Bachelier , L. Olgeirsson , S. Waterman , J. Sharma , E. Dujardin , A. Bouhelier , S. Huant 
 Institut Néel, CNRS - Joseph Fourier University, Grenoble, France
 Imperial College, London, England
 CEMES, CNRS, Toulouse, France
 LICB, CNRS – Bourgogne University, Dijon, France
The unique optical properties of plasmon resonances in noble metal nanoparticles have been extensively investigated owing to their ability to enhance the electric field amplitude but also to tailor its spectral and spatial distribution. Among all application domains, nonlinear optics play a singular role since the efficiency of the underlying physical processes are driven by specific symmetry ...
T. Santos, L.C. Costa[1,2], M. Valente[1,2], J. Monteiro[1,2], and J. Sousa
University of Aveiro, Portugal
I3N, Aveiro, Portugal
TEKA Portugal S.A., Ílhavo, Portugal
In microwave heating applications, the energy is introduced directly into the volume of the material and as consequence the quality of the process is highly dependent on the uniformity of the electromagnetic field distribution along it. That is, the non uniformity of the heating is a potential problem with serious consequences. Thermal runaway is the most critical, in materials with temperature ...
A. Leggieri, F. Di Paolo, D. Passi
Univeristy of Rome "Tor Vergata" - Department of Electronic Engineering, Rome, Italy
This paper describes the design and characterization of an 8 slots resonant cavity Magnetron, which undergoes thermal-structural effects due to cathode heating. The proposed study involves Thermal Stress, Eigen-frequency and Particle Tracing analysis based on COMSOL Multiphysics®. Magnetrons are well known and often utilized High Power Radiofrequency Vacuum Tube oscillators. In order to ...