Efficient FDTD Simulation of Active Photonic Devices With Multiple Temporal Resolutions

Author

Ravi, Koustuban ; Wang, Qian ; Ho, Seng-Tiong

Author_Institution

Data Storage Insitute, Nat. Univ. of Singapore, Singapore, Singapore

Volume

24

Issue

7

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

584

Lastpage

586

Abstract

A computational method to reduce computational time for finite-difference time-domain simulations of active photonic devices by using different temporal resolutions for the update of Maxwell´s equations and active-medium (AM) equations are presented. A larger temporal resolution for the update of AM equations is used due to their slower evolution in comparison to the electromagnetic fields. Slow varying envelope approximation in the carrier rate equations are avoided. The method is easy to implement and is validated through numerical examples of semiconductor microdisk lasers. A speed enhancement of between two to threefold can be obtained without loss in accuracy.

Keywords

Maxwell equations; finite difference time-domain analysis; microdisc lasers; semiconductor lasers; FDTD simulation; Maxwell´s equations; active medium equations; active photonic devices; carrier rate equations; different temporal resolutions; finite-difference time-domain simulations; multiple temporal resolutions; semiconductor microdisk lasers; slow varying envelope approximation; Computational modeling; Equations; Finite difference methods; Mathematical model; Numerical models; Photonics; Time domain analysis; Finite-difference methods; photonic devices;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2183865

Filename

6129478