Abstract

The left-handed behavior of a photonic-crystal flat lens with a graded index in a honeycomb lattice is proposed and theoretically studied. The performance of the flat superlens imaging of this structure has been demonstrated by finite-difference time-domain simulations. The full width at half-maximum of the image decreases to 62% compared to that of the image of a photonic-crystal slab without a graded index. The evanescent waves can be amplified and propagate to the far-field range. The image is not limited to be near the interface. The canalization effect of this structure is analyzed, and the tolerance of the edge cut of the graded-index structure is pretty good.

© 2011 Optical Society of America

Absolute left-handed behaviors in a triangular elliptical-rod photonic crystal

Zhixiang Tang, Runwu Peng, Dianyuan Fan, Shuangchun Wen, Hao Zhang, and Liejia Qian
Opt. Express 13(24) 9796-9803 (2005)

Dual-negative refraction in photonic crystals with hexagonal lattices

G. Y. Dong, J. Zhou, X. L. Yang, and L. Z. Cai
Opt. Express 19(13) 12119-12124 (2011)

Anomalous refractive effects in honeycomb lattice photonic crystals formed by holographic lithography

G. Y. Dong, X. L. Yang, and L. Z. Cai
Opt. Express 18(16) 16302-16308 (2010)

Graded negative index lens by photonic crystals

Qi Wu, John M. Gibbons, and Wounjhang Park
Opt. Express 16(21) 16941-16949 (2008)

Optical properties of a square-lattice photonic crystal within the partial bandgap

Zhixiang Tang, Runwu Peng, Yunxia Ye, Chujun Zhao, Dianyuan Fan, Hao Zhang, and Shuangchun Wen
J. Opt. Soc. Am. A 24(2) 379-384 (2007)