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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 28, Iss. 6 — Jun. 1, 2011
  • pp: 1032–1040

High-frequency homogenization for checkerboard structures: defect modes, ultrarefraction, and all-angle negative refraction

Richard V. Craster, Julius Kaplunov, Evgeniya Nolde, and Sebastien Guenneau  »View Author Affiliations


JOSA A, Vol. 28, Issue 6, pp. 1032-1040 (2011)
http://dx.doi.org/10.1364/JOSAA.28.001032


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Abstract

The counterintuitive properties of photonic crystals, such as all-angle negative refraction (AANR) [ J. Mod. Opt. 34, 1589 (1987)] and high-directivity via ultrarefraction [ Phys. Rev. Lett. 89, 213902 (2002)], as well as localized defect modes, are known to be associated with anomalous dispersion near the edge of stop bands. We explore the implications of an asymptotic approach to uncover the underlying structure behind these phenomena. Conventional homogenization is widely assumed to be ineffective for modeling photonic crystals as it is limited to low frequencies when the wavelength is long relative to the microstructural length scales. Here a recently developed high-frequency homogenization (HFH) theory [ Proc. R. Soc. Lond. A 466, 2341 (2010)] is used to generate effective partial differential equations on a macroscale, which have the microscale embedded within them through averaged quantities, for checkerboard media. For physical applications, ultrarefraction is well described by an equivalent homogeneous medium with an effective refractive index given by the HFH procedure, the decay behavior of localized defect modes is characterized completely, and frequencies at which AANR occurs are all determined analytically. We illustrate our findings numerically with a finite-size checkerboard using finite elements, and we emphasize that conventional effective medium theory cannot handle such high frequencies. Finally, we look at light confinement effects in finite-size checkerboards behaving as open resonators when the condition for AANR is met [ J. Phys. Condens. Matter 15, 6345 (2003)].

© 2011 Optical Society of America

OCIS Codes
(050.1755) Diffraction and gratings : Computational electromagnetic methods
(050.2065) Diffraction and gratings : Effective medium theory
(160.3918) Materials : Metamaterials
(160.5293) Materials : Photonic bandgap materials
(050.5298) Diffraction and gratings : Photonic crystals
(050.5745) Diffraction and gratings : Resonance domain

ToC Category:
Physical Optics

History
Original Manuscript: October 28, 2010
Revised Manuscript: March 23, 2011
Manuscript Accepted: March 26, 2011
Published: May 17, 2011

Citation
Richard V. Craster, Julius Kaplunov, Evgeniya Nolde, and Sebastien Guenneau, "High-frequency homogenization for checkerboard structures: defect modes, ultrarefraction, and all-angle negative refraction," J. Opt. Soc. Am. A 28, 1032-1040 (2011)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-28-6-1032

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