Showing 2 results for Kerr Effect
A. Khodabakhsh, M. K. Moravvej-Farshi, M. Ebnali-Heidari,
Volume 7, Issue 2 (6-2011)
Abstract
We report the simulation results for impact of nonlinear Kerr effect on band structures of a two dimensional photonic crystal (2D-PhC) with no defect, a PhC based W1-waveguide (W1W), and also Coupled-Cavity Waveguides (CCWs). All PhC structres are assumed to a square lattice of constant a made of GaAs rods of radius r=0.2a, in an air background. The numerical simulation was performed using the nonlinear finite difference time domain (NFDTD) technique. To study the impact of Kerr effect on the photonic band structures, E-polarized lights of peak input intensities 0.5 GW-cm−2≤I≤25 GW-cm−2 have been used. The numerical results have shown that as the input light intensity increases, the band edges for all PhC waveguide structures considered experience red shifts. These numerical results for CCWs also show that the larger the light input intensity, the smaller is the corresponding maximum light group velocity.
Z. N. Zakaria, M. S. Laili, N. A. Rahman, P. L. Lewin, T. Andritsch, N. Hussin,
Volume 21, Issue 2 (6-2025)
Abstract
The study investigates the electric field and space charge distributions in propylene carbonate under direct current (DC) applied fields using Kerr effect. Propylene carbonate is known for its high permittivity and is utilised in many applications, including electrochemical systems and dielectric materials. Understanding the behaviour of electric fields and space charge distributions within propylene carbonate is critical for optimising its performance in these applications. In the study, Kerr effect is employed which by applying the DC electric field across the test liquid for measuring the electric field and space charge distributions within the propylene carbonate. The experimental setup involved a controlled application of DC fields, and the Kerr effect measurements were conducted using an optical system. The results show significant understandings into the behaviour of space charges and their influence on the electric field distribution in propylene carbonate. Distinct patterns of charge accumulation and electric field distortion were observed and analysed in the dielectric liquid properties and charge transport mechanisms. The relationship between electric fields and space charges in propylene carbonate under DC conditions has been provided by the findings. The study also shows that the Kerr effect is a useful tool for studying electric field distributions in complex materials.
