| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 7, 2012
|
|
|---|---|---|
| Article Number | 12045 | |
| Number of page(s) | 5 | |
| DOI | https://doi.org/10.2971/jeos.2012.12045 | |
| Published online | 11 November 2012 | |
Regular papers
Subwavelength resolution of the annular photonic crystal with negative refraction
Key Laboratory of Photonics Materials and Technology, College of Physics Science, Qingdao University, Qingdao, 266071, China
Received:
24
July
2012
Revised:
15
October
2012
In this paper, negative refraction in the two-dimensional (2D) hexagonal lattices annular photonic crystal (APC) was theoretically studied. The annular photonic crystal was obtained by introduced circular-air-hole in the core of the Si-rod. The properties of the designed APC, such as photonic band structure, equal-frequency contours (EFCs) and the electric field distribution are analyzed by using Plane Wave Expansion (PWE) method and Finite-Difference Time-Domain (FDTD) method. Numerical simulations show that negative refraction and super-lens imaging can be realized in the designed annular photonic crystal for the normalized frequency from 0.2983(2πc/a) to 0.347(2πc/a). And it was also found that the resolution decreases linearly with the increasing of the inner radius.
Key words: Negative refraction / annual photonic crystal (APC) / plane wave expansion (PWE) / finite-difference time-domain (FDTD) / superlens
© The Author(s) 2012. All rights reserved.
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