Transient analysis of plasmon modes in metallic nanoparticles using numerical inversion of laplace transform

Near-field optics plays an important role in developing ultra-high density recording and micro fabrication technologies. Conventionally, the time domain analysis of near-field lights generated by metallic nanoparticles has been performed by the finite-difference time-domain method or solving eigenvalue problems for the integral equation. In this paper, numerical inversion of Laplace transform is applied to analyze the time domain responses of specific plasmon modes in metallic nanoparticles. We discuss the computational accuracy of our method and verify that the proposed method is error controllable and reliable simulation can be performed.