SZFI Szeminárium
Szarvas Tamás
(Budapest University of Technology and Economics, Department of Atomic Physics, vendéglátó: Kis Zsolt)
Simulation of electromagnetic wave propagation in structured dielectrics
I will give an introduction to Computational Electromagnetic Methods on structured grids. Four different methods will be shown: Finite Difference Time Domain method, Finite Difference Frequency Domain method, Method of Lines, and the Rigorously Coupled Wave Approximation. We have applied these methods for the simulation of electromagnetic wave reflection from a special, T-shaped groove grating [1]. I will discuss how to optimize parameters for various applications, such as broad band dielectric mirrors, band filters, dichroic beam splitters.
I will also present a novel method for the description of second order nonlinear propagation of electromagnetic waves: the Non-Linear Finite Difference Frequency Domain method [2]. We have applied this method to various nonlinear structures, such as nonlinear homogeneous crystals, Periodically Poled Lithium Niobate crystal, and two-dimensionally structured nonlinear materials. Using this method, we have simulated Second Harmonic Generation in an array of nonlinear cylinders.
[1] T. Szarvas, Zs. Kis, “Optimization of a T-shaped optical grating for specific applications,” Optical Engineering 55(7), 077103 (2016).
[2] T. Szarvas, Zs. Kis, “Numerical simulation of nonlinear second harmonic wave generation by the finite difference frequency domain method,” JOSA B 35(4), 731-740 (2018).
2018. április 10. kedd, 10.00
Wigner FK SZFI, 1. ép. 1. em. nagy előadóterem