The influence of structural/shape anisotropy in 2-D photonic crystals

被引：4

作者：

Feng, Zhifang ^{[1
,2
]}

Zhang, Dandan ^{[1
]}

Zhan, Ketao ^{[1
]}

Shao, Xiaohong ^{[1
]}

Raja, M. Yasin Akhtar ^{[2
]}

机构：

[1] Beijing Univ Chem Technol, Coll Sci, Beijing 100029, Peoples R China

[2] Univ N Carolina, Ctr Optoelect & Opt Commun, Charlotte, NC 28223 USA

来源：

PHYSICA B-CONDENSED MATTER | 2013年 / 422卷

关键词：

Photonic crystal; Structure/shape anisotropy; Bandgap; Defects; Rotation; Triangular cross-section; DIRECTIONAL COUPLER; BAND-GAP; EMISSION; DESIGN;

D O I：

10.1016/j.physb.2013.04.025

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Using the finite-difference time-domain method, photonic bandgaps and defect modes in two-dimensional photonic crystals based on "triangular cylinders" are simulated. Compared with the circular cross-section rods, there is a structural/shape anisotropy in triangular cross-section based cylinders. When all cylinders are rotated for different angles along clockwise or counter-clockwise, a small shift at the high band-edge is observed even if the filling fraction did not change. When defect is introduced in photonic crystals, the defect modes can be adjusted by rotation of cylinders which are in the neighborhood of the defect. All results show that the structural/shape anisotropy of cylinders can be used to adjust the photonic bandgap and defect modes. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：6 / 11

页数：6

共 28 条

[1] Three-dimensional hybrid implicit-explicit finite-difference time-domain method in the cylindrical coordinate system [J].

Chen, J. ;

Wang, J. ;

Tian, C. .

IET MICROWAVES ANTENNAS & PROPAGATION, 2009, 3 (08) :1254-1261

[2]

Corzine S.W., 1989, PHOTON TECHNOL LETT, V1, P52

[3] Experimental demonstration of photonic crystal directional coupler at microwave frequencies [J].

Cuesta, F ;

Griol, A ;

Martínez, A ;

Martí, J .

ELECTRONICS LETTERS, 2003, 39 (05) :455-456

[4] Engineering the light propagating features through the two-dimensional coupled-cavity photonic crystal waveguides [J].

Feng Shuai ;

Wang Yi-Quan .

CHINESE PHYSICS B, 2011, 20 (05)

[5] Absolute photonic band gaps of two-dimensional square-lattice photonic crystals with Taiji-shaped dielectric rods [J].

He, Xing-Dao ;

Du, Shou-Xiao ;

Liu, Bin ;

Li, Shu-Jing ;

Li, Shan .

OPTICS COMMUNICATIONS, 2011, 284 (14) :3491-3496

[6] FINITE-DIFFERENCE TIME-DOMAIN (FDTD) ANALYSIS OF MAGNETIC DIFFUSION [J].

HOLLAND, R .

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, 1994, 36 (01) :32-39

[7] Improved bends for two-dimensional photonic crystal waveguides [J].

Hu, Zhen ;

Lu, Ya Yan .

OPTICS COMMUNICATIONS, 2011, 284 (12) :2812-2816

[8]

JEWELL J, 1990, LASER FOCUS WORLD, V26, P151

[9] STRONG LOCALIZATION OF PHOTONS IN CERTAIN DISORDERED DIELECTRIC SUPERLATTICES [J].

JOHN, S .

PHYSICAL REVIEW LETTERS, 1987, 58 (23) :2486-2489

[10] Enlargement of absolute photonic band gap in modified 2D anisotropic annular photonic crystals [J].

Khalkhali, T. Fathollahi ;

Rezaei, B. ;

Kalafi, M. .

OPTICS COMMUNICATIONS, 2011, 284 (13) :3315-3322

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