Eur. Phys. J. Appl. Phys.
Volume 42, Number 3, June 2008
|Page(s)||281 - 285|
|Section||Laser, Optics, Optoelectronics and Nanophotonics|
|Published online||04 June 2008|
Imaging property of two-dimensional quasiperiodic photonic crystals
College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin 300072, P.R. China
2 Department of Physics, Beijing Normal University, Beijing 100875, P.R. China
3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P.R. China
Corresponding author: email@example.com
Revised: 26 March 2008
Accepted: 10 April 2008
Published online: 4 June 2008
In this paper, we investigate the propagation of electromagnetic wave in 12-fold symmetric quasiperiod structure employing finite difference time domain (FDTD) method. The quasiperiodic photonic crystal (QPC) consists of a dodecahedral lattice of air holes embedded in a dielectric background. Simulation on wave propagation through a wedge-shaped structure shows that negative refraction can occur at the interface between air and the quasicrystal sample. We further design QPC slab for performance of a high-quality flat lens. Simulation results reveal that non-near-field imaging can be achieved through the QPC slab. TM and TE modes are discussed and both the two modes exhibit the focusing effect. Since the air-hole type QPCs are more easily fabricated and integrated than the dielectric-rod type QPCs, our results might be important to the applications.
PACS: 78.20.Ci – Optical constants / 42.70.Qs – Photonic bandgap materials / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation
© EDP Sciences, 2008
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