Investigation of self-collimation frequencies in 2-D photonic crystals

摘要：

The self-collimation frequencies (SCFs) in two-dimensional photonic crystals (2-D PhC) have been investigated systematically by the plane-wave expansion method. In the wave-vector space, the square-lattice 2-D PhCs have some square-shaped equifrequency contours (EFCs) both for TE modes and for TM modes. Narrow-beam lights with these frequencies can propagate in the directions normal to the flat borders of the EFCs without any significant broadening, which is known as self-collimation effect. We consider the 2-D PhCs consisting of a square lattice of air cylinders in a dielectric material and the 2-D PhCs consisting of a square lattice of dielectric cylinders in air respectively. Calculation results show how SCFs of TM and TE modes change with the radius of cylinders and the refractive index of the material. These results can be applied to designing the PhC devices based on self-collimation effect.

关键词： photonic crystal equifrequency contour self-collimation effect

作者: Guimin Lin Xiyao Chen Yufei Wang Bo Ni Junzhen Jiang Yishen Qiu

作者单位: Dept.of Physics and Electronic Information Engineering,Minjiang Univ.,Fuzhou 350108,China School of Physics and Electromechanical Engineering,Longyan Univ.,Longyan 364012,China School of Physics and Optoelectronics Technology,Fujian Normal Univ.,Fuzhou 350007,China

会议类型: 国际会议

会议名称: 2008亚太光通信会议(Asia-Pacific Optical Communications 2008)

会议地点: 杭州

会议语种:英文

在线出版日期: 2008-10-26（万方平台首次上网日期，不代表论文的发表时间）