Parallel FDTD simulations on optical and acoustic metamaterials

Kenji Tsuruta, Shinji Nagai, Ryosuke Umeda, Tomoyuki Kurose, Noriaki Maetani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We perform large-scale finite-difference time-domain (FDTD) simulations with the aid of efficient parallel-computing algorithms for designing optical and acoustic metamaterials, where either electromagnetic or elastic constants in the materials are artificially modulated via nano/micro-structuring. For optical metamaterials, effects of nanostructure on dielectric properties are taken into account by introducing the Drude-Lorentz model and a hybrid quantum-mechanical/classical FDTD method for optical dispersion of simple metal particles. Using these computational methods, we assess the materials dependence of light-confinement efficiency in the recently proposed novel structure that combines dielectrics and metamaterials periodically. In the acoustic case, we perform the parallel FDTD simulations of elastic-wave propagations in 2D phononic crystals. The negative refraction of acoustic wave is shown to occur via a negative effective mass appeared in their phonon band-structures. We demonstrate that the focal intensity by the lens effect and its energy-transfer efficiency can be optimized by adapting the filling fraction of the crystal.

Original languageEnglish
Title of host publicationNanomaterials - From Modeling and Fabrication to Application
Pages50-55
Number of pages6
Publication statusPublished - Dec 1 2010
Event2009 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 30 2009Dec 4 2009

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1223
ISSN (Print)0272-9172

Other

Other2009 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/30/0912/4/09

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Tsuruta, K., Nagai, S., Umeda, R., Kurose, T., & Maetani, N. (2010). Parallel FDTD simulations on optical and acoustic metamaterials. In Nanomaterials - From Modeling and Fabrication to Application (pp. 50-55). (Materials Research Society Symposium Proceedings; Vol. 1223).