Absolute left-handed behaviors in a triangular elliptical-rod photonic crystal.
In this paper we theoretically study the left-handed behaviors in a two-dimensional triangular photonic crystal made of elliptical rods in air. An absolute left-handed region is found in the second photonic band by using the plane wave expansion method to analyze the photonic band structure and equifrequency contours. Typical left-handed behaviors such as negative refraction, flat superlensing and plano-concave lensing are demonstrated by the finite-difference time-domain simulations. These behaviors are also compared with the quasi-negative refraction and the resulted focusing effects in a square-lattice two-dimensional photonic crystal.
Tang
Zhixiang
Z
Peng
Runwu
R
Fan
Dianyuan
D
Wen
Shuangchun
S
Zhang
Hao
H
Qian
Liejia
L