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Light propagation in two dimensional hexagonal lattices photonic crystal

PING JIANG1,* , KANG XIE2, HUAJUN YANG1, ZHENHAI WU2

Affiliation

  1. College of Physical Electronics, University of Electronic Science and Technology of China, Sichuan Province 610054, China
  2. College of Optoelectronic Information, University of Electronic Science and Technology of China, Sichuan Province 610054, China

Abstract

In this work we demonstrate that light propagation in two dimensional (2D) hexagonal lattices photonic crystals (PhCs) exhibit unusual properties, such as negative refraction and preferential-direction waveguiding effects. When air-PhC interface normal is along Г-M direction, such crystals behave as if they have a certain effective refraction index controllable by the band structure, and can be used to achieve subwavelength imaging. When the interface normal is along Г-K direction, the propagation is allowed in the Г-M direction. Plane wave expansion method was used to plot equal-frequency surfaces (EFCs). Finite-difference time-domain (FDTD) simulation was used to visualize wave propagation in PhC..

Keywords

Effective refraction index; Negative refraction; Preferential-direction waveguide; Finite-difference time-domain simulation.

Submitted at: July 14, 2011
Accepted at: July 25, 2011

Citation

PING JIANG, KANG XIE, HUAJUN YANG, ZHENHAI WU, Light propagation in two dimensional hexagonal lattices photonic crystal, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 7, pp. 748-754 (2011)