Accurate simulation of THz generation with Finite-Element Time Domain methods

TL;DR

This paper develops a precise finite-element time domain simulation method for broadband nonlinear optical processes, including THz generation in PPLN, without relying on the slowly varying envelope approximation.

Contribution

It introduces a novel numerical simulation approach that accurately models complex nonlinear optical phenomena in the time domain, enhancing the understanding of THz generation.

Findings

Accurate broadband simulations of nonlinear optical processes.

Effective modeling of THz generation in PPLN.

Validation of simulation accuracy through numerical results.

Abstract

We investigate the accurate full broadband simulation of complex nonlinear optical processes. A mathematical model and numerical simulation techniques in the time domain are developed to simulate complex nonlinear optical processes without the usual used slowly varying envelope approximation. We illustrate the accuracy by numerical simulations. Furthermore, they are used to elucidate THz generation in periodically poled Lithium Niobate (PPLN) including optical harmonic generation.