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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 13 — Jun. 20, 2011
  • pp: 12119–12124

Dual-negative refraction in photonic crystals with hexagonal lattices

G. Y. Dong, J. Zhou, X. L. Yang, and L. Z. Cai  »View Author Affiliations

Optics Express, Vol. 19, Issue 13, pp. 12119-12124 (2011)

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We present a dual-negative refraction effect based on the overlapping bands in a two-dimensional triangular photonic crystal formed by holographic lithography. Under certain conditions, one incident plane wave launched into this photonic crystal can be dispersed into two negative refracted waves at the same frequency and the same perpendicular polarization state with different phase velocities and group velocities. We find that this dual-negative refraction behavior can be easily manipulated by adjusting the incident angle, the frequency of incident wave and the filling ratio of the PhC. This special effect can be applied to realize wave-front division and optical interference in optical holography. Based on this effect, a double focusing imaging phenomenon has been achieved by the PhC slab. These unique features may show great impacts on both fundamental physics and optical device applications.

© 2011 OSA

OCIS Codes
(350.3618) Other areas of optics : Left-handed materials
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(160.5298) Materials : Photonic crystals

ToC Category:
Photonic Crystals

Original Manuscript: May 4, 2011
Revised Manuscript: May 30, 2011
Manuscript Accepted: May 31, 2011
Published: June 7, 2011

G. Y. Dong, J. Zhou, X. L. Yang, and L. Z. Cai, "Dual-negative refraction in photonic crystals with hexagonal lattices," Opt. Express 19, 12119-12124 (2011)

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