Title : ( Multipole expansion of periodic discrete dipole approximation and its application to subwavelength dielectric arrays )
Authors: Muhammad Reza Malekfar , Mehrdad Shokooh-Saremi , Mir Mojtaba Mirsalehi ,
دانلود فایل برای اعضای دانشگاهAccess to full-text not allowed by authors
Abstract
Light-matter interaction in all-dielectric nanoparticles has attracted more attention because of the abil- ity to control and configure light scattering on high-index nanoparticles. In the framework of the dis- crete dipole approximation, we theoretically applied cartesian multipole expansion to a periodic array of nanoparticles. This allows to analyze the contribution of multipole moments, including toroidal moments, in the scattering spectra of an array of infinite 1D/2D periodic structure of arbitrary shaped nanoparticles. The formulation is based on the Taylor expansion in cartesian coordinate system up to the fifth-order that includes a magnetic 16-pole and an electric 32-pole. Examples of a wide-band reflector and a wide-band transmitter made of silicon nanodisks are studied at IR wavelengths. The results show how constructive and destructive interferences of multipole terms affect the scattering field. The proposed method paves the way to design and analyze novel types of nanoscale subwavelength metasurfaces.
Keywords
, Subwavelength optics of structured materials, Discrete dipole approximation, Multipole expansion, Toroidal moments, Periodic structures.
@article{paperid:1080357,
author = {Malekfar, Muhammad Reza and Shokooh-Saremi, Mehrdad and Mirsalehi, Mir Mojtaba},
title = {Multipole expansion of periodic discrete dipole approximation and its application to subwavelength dielectric arrays},
journal = {Journal of Quantitative Spectroscopy and Radiative Transfer},
year = {2020},
volume = {254},
number = {1},
month = {October},
issn = {0022-4073},
pages = {107192--107199},
numpages = {7},
keywords = {Subwavelength optics of structured materials; Discrete dipole approximation; Multipole expansion; Toroidal moments; Periodic structures.},
}
%0 Journal Article
%T Multipole expansion of periodic discrete dipole approximation and its application to subwavelength dielectric arrays
%A Malekfar, Muhammad Reza
%A Shokooh-Saremi, Mehrdad
%A Mirsalehi, Mir Mojtaba
%J Journal of Quantitative Spectroscopy and Radiative Transfer
%@ 0022-4073
%D 2020
