Efficient Computation of Power, Force, and Torque in BEM Scattering Calculations

Author

Reid, M. T. Homer ; Johnson, Steven G.

Author_Institution

Dept. of Math., Massachusetts Inst. of Technol., Cambridge, MA, USA

Volume

63

Issue

8

fYear

2015

fDate

Aug. 2015

Firstpage

3588

Lastpage

3598

Abstract

We present concise, computationally efficient formulas for several quantities of interest-including absorbed and scattered power, optical force (radiation pressure), and torque-in scattering calculations performed using the boundary-element method (BEM) [also known as the method of moments (MoM)]. Our formulas compute the quantities of interest directly from the BEM surface currents with no need ever to compute the scattered electromagnetic fields. We derive our new formulas and demonstrate their effectiveness by computing power, force, and torque (PFT) in a number of example geometries. Free, open-source software implementations of our formulas are available for download online.

Keywords

boundary-elements methods; electromagnetic wave scattering; method of moments; BEM scattering calculations; MoM; PFT; boundary-element method; electromagnetic scattering fields; method of moments; Force; Geometry; Integral equations; Method of moments; Scattering; Sparse matrices; Torque; Casimir effect; Method of moments; electromagnetic propagation; extinction coefficients; force; method of moments (MoM); nanophotonics; nanosensors; torque;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2438393

Filename

7114235