«discrete dipole approximation dda»
۱۰۲ نتیجهComparison between the pseudo-spectral time domain method and the discrete dipole approximation for light scattering simulations
The pseudo-spectral time domain (PSTD) and the discrete dipole approximation (DDA) are two popular and robust methods for the numerical simulation of dielectric particle light scattering. The present study compares the numerical performances of the two methods in the computation
Accuracy of the discrete dipole approximation for simulation of optical properties of gold nanoparticles
We studied the accuracy of the discrete dipole approximation (DDA) for simulations of absorption and scattering spectra by gold nanoparticles (spheres, cubes, and rods ranging in size from 10 to 100 nm). We varied the dipole resolution and applied two DDA formulations, employing
Discrete-dipole approximation for scattering calculations
The discrete-dipole approximation (DDA) for scattering calculations, including the relationship between the DDA and other methods, is reviewed. Computational considerations, i.e., the use of complex-conjugate gradient algorithms and fast-Fourier-transform methods, are discussed.
The discrete dipole approximation for periodic targets: I. theory and tests
The discrete-dipole approximation (DDA) is a powerful method for calculating absorption and scattering by targets that have sizes smaller than or comparable to the wavelength of the incident radiation. The DDA can be extended to targets that are singlyor doubly-periodic. We gener
The Discrete Dipole Approximation for Assessing the Feasibility of Polarimetric 95 Ghz Radar Measurements
Cirrus clouds play an important role in the Earth’s radiation budget. The transfer of radiation through ice cloud layers depends on the particle phase, concentration, size distribution, and the cloud thickness and shape. Consequently, for reliable simulations of present and futur
Discrete Dipole Approximation simulations of gold nanorod optical properties: choice of input parameters and comparison with experiment
Gold nanorods have interesting optical properties due to surface plasmon resonance effects. A variety of biomedical applications of these particles have been envisaged and feasibilities demonstrated in imaging, sensing and therapy based on the interactions of light with these par
User Guide for the Discrete Dipole Approximation Code DDSCAT (Version 5a10)
DDSCAT.5a is a freely available software package which applies the “discrete dipole approximation” (DDA) to calculate scattering and absorption of electromagnetic waves by targets with arbitrary geometries and complex refractive index. The DDA approximates the target by an array
Using a discrete dipole approximation to predict complete scattering of complicated metamaterials
We develop a numerical technique for simulating metamaterial electromagnetic response based on an adaptation of the discrete dipole approximation (DDA). Our approach reduces each constituent metamaterial element within the composite to a point dipole with electric and magnetic po
Error analysis of backscatter from discrete dipole approximation for different ice particle shapes
Ice sphere backscatter has been calculated using both Mie theory and the discrete dipole approximation (DDA) at a wavelength of 3.2 mm (94 GHz). The electric dipole, magnetic dipole and electric quadrupole contributions to spherical particle backscatter have been analyzed. The re
calculation of the induced charge distribution on the surface of a metallic nanoparticle due to an oscillating dipole using discrete dipole approximation method
in this paper, the interaction between an oscillating dipole moment and a silver nanoparticle has been studied. our calculations are based on mie scattering theory and discrete dipole approximation(dda) method.at first, the resonance frequency due to excitingthe localized surface