Author Affiliations
Abstract
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 800-211, Shanghai 201800, People’s Republic of China
2 School of Computer and Communication, Hunan University, Changsha 410082, People’s Republic of China
3 Department of Optical Science and Engineering, Fudan University, Shanghai 200433, People’s Republic of China
In contrast to previous two-dimensional coated photonic crystals, in this paper we propose a left-handed one that is made of dielectric tubes arranged in a close-packed hexagonal lattice. Without metallic cores, this structure is low-loss and convenient to fabricate. Negative refraction and its resulting focusing are investigated by dispersion characteristic analysis and numerical simulation of the field pattern. With proper modification at the interface, the image is improved. With better isotropy than that with noncircular rods, planoconcave lenses made by dielectric tubes focus a Gaussian beam exactly at R/|n?1|.
left-handed materials photonic crystal superlens Collection Of theses on high power laser and plasma physics
2006, 4(1): 86
