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Optical and Quantum Electronics

, Volume 45, Issue 4, pp 343–348 | Cite as

Efficient broadband simulations for thin optical structures

  • Xuesong MengEmail author
  • Phillip Sewell
  • Ana Vukovic
  • Harshana G. Dantanarayana
  • Trevor M. Benson
Article

Abstract

The thickness of the layers comprising optical structures is usually very thin. When modelling such thin features using a traditional numerical method, for instance the transmission-line modelling (TLM) method, a very small space step is often used to properly discretize the material geometry. This consequently results in large memory storage and longer run time. In this paper a new technique embedding thin structures between TLM nodes is investigated. The key features of this technique are the acquisition of the formulations in the frequency domain and the utilisation of digital filter theory and an inverse Z transform to change the formulations to the time domain. This technique has been successfully applied to calculate the reflection and transmission coefficients of optical structures incorporating thin layers, including antireflection coatings and fibre Bragg grating structures.

Keywords

Antireflection coatings Digital filter theory Fibre Bragg grating Transmission line modelling method 

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Xuesong Meng
    • 1
    Email author
  • Phillip Sewell
    • 1
  • Ana Vukovic
    • 1
  • Harshana G. Dantanarayana
    • 1
  • Trevor M. Benson
    • 1
  1. 1.Faculty of Engineering, George Green Institute for Electromagnetics ResearchUniversity of NottinghamNottinghamUK

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