Comparison of absorption simulation in semiconductor nanowire and nanocone arrays with the Fourier modal method, the finite element method, and the finite-difference time-domain method

Nicklas Anttu, Henrik Mäntynen, Toufik Sadi, Antti Matikainen, Jari Turunen, Harri Lipsanen

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Abstract

For the design of nanostructured semiconductor solar cells and photodetectors, optics modelling can be a useful tool that reduces the need of time-consuming and costly prototyping. We compare the performance of three of the most popular numerical simulation methods for nanostructure arrays: the Fourier modal method (FMM), the finite element method (FEM) and the finite-difference time-domain (FDTD) method. The difference between the methods in computational time can be three orders of magnitude or more for a given system. The preferential method depends on the geometry of the nanostructures, the accuracy needed from the simulations, whether we are interested in the total, volume-integrated absorption or spatially resolved absorption, and whether we are interested in broadband or narrowband response. Based on our benchmarking results, we provide guidance on how to choose the method.
Original languageEnglish
Article number030034
Number of pages12
JournalNano Express
Volume1
DOIs
Publication statusPublished - 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • optics simulation
  • Fourier modal method (FMM)
  • finite element method (FEM)
  • finite-difference time-domain (FDTD) method
  • absorption
  • nanostructure array

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