Hostname: page-component-848d4c4894-pftt2 Total loading time: 0 Render date: 2024-06-01T01:03:44.184Z Has data issue: false hasContentIssue false
  • English
  • Français

Parallel FDTD Simulations on Optical and Acoustic Metamaterials

Published online by Cambridge University Press:  15 March 2011

Kenji Tsuruta ,
Shinji Nagai ,
Ryosuke Umeda ,
Tomoyuki Kurose  and
Noriaki Maetani
Kenji Tsuruta
Affiliation:
Department of Electrical and Electronic Engineering, Okayama University, Okayama 700-8530, Japan
Shinji Nagai
Affiliation:
Department of Electrical and Electronic Engineering, Okayama University, Okayama 700-8530, Japan
Ryosuke Umeda
Affiliation:
Department of Electrical and Electronic Engineering, Okayama University, Okayama 700-8530, Japan
Tomoyuki Kurose
Affiliation:
Department of Electrical and Electronic Engineering, Okayama University, Okayama 700-8530, Japan
Noriaki Maetani
Affiliation:
Department of Electrical and Electronic Engineering, Okayama University, Okayama 700-8530, Japan
Get access

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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1223 , 2009 , 1223-EE06-09
Copyright
Copyright © Materials Research Society 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Veselago, V. G., Sov. Phys. Usp. 10, 509 (1968).Google Scholar
2. Pendry, J. B., Phys. Rev. Lett. 85, 3966 (2000).Google Scholar
3. Pendry, J. B. and Smith, D. R., Physics Today 57, 37 (2004).Google Scholar
4. Valentine, J. et al., Nature 455, 07247 (2008).Google Scholar
5. Zhang, X. D. and Liu, Z., Appl. Phys. Lett. 85, 341 (2004).Google Scholar
6. Feng, L. et al., Phys. Rev. B 73, 193101 (2006).Google Scholar
7. Taflove, A. and Hangess, S. C.: Computational Electrodynamics, The Finite-Difference Time-Domain Method, Third Edition, (Artech House, London, 2005).Google Scholar
8. Umeda, R., Totsuji, C., Tsuruta, K. and Totsuji, H., Mater. Trans 50, 994 (2009).Google Scholar
9. Kurose, T., Tsuruta, K., Totsuji, C. and Totsuji, H., Mater. Trans 50, 1004 (2009).Google Scholar
10. Johnson, P. B. and Christy, R. W., Phys. Rev. B. 85, 4370 (1972).Google Scholar
11. Kreibig, U. and Vollmer, M.: Optical Properties of Metal Clusters (Springer Series. in Materials Science, Vol. 25, Springer, Berlin 1995).Google Scholar
12. Ramakrishna, S. Anantha, Guenneau, S., Enoch, S., Tayeb, G., and Gralak, B., Phys. Rev. A. 75, 063830 (2007).Google Scholar