We present a three-dimensional finite-difference time-domain analysis of localized defect modes in an optically thin dielectric slab that is patterned with a two-dimensional array of air holes. The symmetry, quality factor, and radiation pattern of the defect modes and their dependence on the slab thickness are investigated. © 1999 Optical Society of America [S0740-3224(99)01302-8] OCIS codes: ...

where is the angular frequency and F/m is the dielectric constant c of vacuum. The contribution of the bulk conductivity ( ) have been here separated to any other sort of losses ( ). The problem of the electromagnetic scattering due to a dielectric slab is briefly introduced. To this aim the model shown in Fig. 1 is considered: a unit amplitude wave is incident on a dielectric slab of thick...

Quality inspection is an indispensable part of modern industrial manufacturing. Steel as a major industry requires constant surveillance and supervision through its various stages of production. Continuous casting is a critical step in the steel manufacturing process in which molten steel is solidified into a semi-finished product called slab. Once the slab is released from the casting unit, th...

A mathematical model, simulating the transport and fate of nonionizable organic compounds in unsaturated/saturated porous media (soils) in a terrestrial microcosm has been developed. Using the principles of water mass, momentum, heat energy and chemical mass balance, the three fields: moisture, temperature, and liquid phase chemical concentration are solved for simultaneously by coupling the so...

Comb-actuated micro-electromechanical oscillators are efficient sensors that can be used to study the properties of liquid helium in slab geometry. Complete characterization of these devices will help us to better understand the effects of different mediums on the quality factor of the device. The eigenmodes of two different designs; H1 and H2, are simulated using COMSOL Multiphysics. A shear m...