Focusing analysis of a complex photonic crystal slab with negative refraction

Hung Wen Wang; Mei Ling Wu; Lien Wen Chen

doi:10.1016/j.physb.2010.07.005

Focusing analysis of a complex photonic crystal slab with negative refraction

Hung Wen Wang, Mei Ling Wu, Lien Wen Chen

Department of Mechanical Engineering

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

The electromagnetic wave propagation in a two-dimensional (2D) complex triangular photonic crystal (PC) consisting of dielectric cylinders of different radii in air is investigated. The plane wave expansion (PWE) and finite element (FE) methods are used to study the optical and focusing properties of the complex PC. Interestingly, in contrast to a triangular PC consisting of dielectric cylinders of the same radius, the complex PC can generate a focusing effect with an effective refractive index of -1. Furthermore, a design is proposed using antireflection structures to enhance the transmission efficiency of light at the interfaces between the air and the PC slab. Numerical simulations show that appropriately adding antireflection structures to the surface of the slab can greatly improve the focusing resolution. Crown

Original language	English
Pages (from-to)	4157-4162
Number of pages	6
Journal	Physica B: Condensed Matter
Volume	405
Issue number	19
DOIs	https://doi.org/10.1016/j.physb.2010.07.005
Publication status	Published - 2010 Oct 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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Wang, H. W., Wu, M. L., & Chen, L. W. (2010). Focusing analysis of a complex photonic crystal slab with negative refraction. Physica B: Condensed Matter, 405(19), 4157-4162. https://doi.org/10.1016/j.physb.2010.07.005

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