Sunflower photonic quasicrystals

Liao，Y. F.1; Yang，Y.1; Dai，H. T.1; Wang，S. G.1; Sun，X. W.1,2

10.1117/12.2002892

2013

0277-786X

Proceedings of SPIE - The International Society for Optical Engineering

8632

San Francisco, CA, United states

SPIE

In this paper, we present one planar graded photonic quasicrystals based on phyllotaxy structure (PSPQ) to mimic the Luneburg lens. The PSPQ is composed by discrete cylinders, which radius are determined by the index profile of Luneburg lens and Maxwell-Garnett effective medium theory, to mimic the graded index (GRIN) materials. Numerical simulations are performed to investigate the focusing features of the PSPQs by means of finite difference time domain (FDTD) methods. Numerical results show that the PSPQs-based Luneburg lens can focus the light more tightly and efficiently in comparison with conventional graded photonic crystals. Meanwhile, we also explored the focusing properties of PSPQs with different generating angle, which determined the spiral type of phyllotaxy structures, to optimize the focusing behavior of the proposed devices. © 2013 SPIE.

Graded index materials Luneburg lens Photonic quasicrystal Phyllotaxy structure

其他

英语

CPCI-S ; EI

WOS:000322962900009

20132316390646

Finite difference time domain method ; Focusing ; Nanostructures ; Numerical methods ; Time domain analysis

Nanotechnology:761 ; Mathematics:921 ; Numerical Methods:921.6 ; Solid State Physics:933

2-s2.0-84878280011

Scopus

1.Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology,School of Science,Tianjin University,Tianjin 300072,China
2.Department of Electronic and Computer Engineering,South University of Science and Technology of China,Shenzhen,Guangdong,China

Liao，Y. F.,Yang，Y.,Dai，H. T.,et al. Sunflower photonic quasicrystals[C]:SPIE,2013.