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

By M. T. H. Reid, Steven G. Johnson. IEEE Transactions on Antennas and Propagation, 2013

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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.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/381afdedfcefa2ae691ec738112df371cdd717c0