Field-only integral equation method for time domain scattering of electromagnetic pulses

TL;DR

This paper introduces a stable, non-singular boundary integral method for electromagnetic pulse scattering, enabling accurate time-domain analysis and revealing local field enhancements relevant to microphotonics.

Contribution

It presents a novel non-singular boundary integral approach for direct field component calculation in frequency domain, combined with Fourier transform for time-domain results.

Findings

Accurate field amplitudes and phases near boundaries

Demonstration of local field enhancement effects

Method stability across different wavelength scales

Abstract

The scattering of electromagnetic pulses is described using a non-singular boundary integral method to solve directly for the field components in the frequency domain, and Fourier transform is then used to obtain the complete space-time behavior. This approach is stable for wavelengths both small and large relative to characteristic length scales. Amplitudes and phases of field values can be obtained accurately on or near material boundaries. Local field enhancement effects due to multiple scattering of interest to applications in microphotonics are demonstrated.