中国物理B ›› 2011, Vol. 20 ›› Issue (5): 54209-054209.doi: 10.1088/1674-1056/20/5/054209

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Engineering the light propagating features through the two-dimensional coupled-cavity photonic crystal waveguides

冯帅, 王义全   

  1. School of Science, Minzu University of China, Bejiing 100081, China
  • 收稿日期:2010-09-09 修回日期:2010-10-19 出版日期:2011-05-15 发布日期:2011-05-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10904176 and 11004169), the Research Foundation of the State Ethnic Affairs Commission of People's Republic of China (Grant Nos. 10ZY05 and 09ZY012), and the "985 Project" a

Engineering the light propagating features through the two-dimensional coupled-cavity photonic crystal waveguides

Feng Shuai(冯帅)† and Wang Yi-Quan(王义全)   

  1. School of Science, Minzu University of China, Bejiing 100081, China
  • Received:2010-09-09 Revised:2010-10-19 Online:2011-05-15 Published:2011-05-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10904176 and 11004169), the Research Foundation of the State Ethnic Affairs Commission of People's Republic of China (Grant Nos. 10ZY05 and 09ZY012), and the "985 Project" and "211 Project" of the Ministry of Education of China.

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摘要： This paper studies the propagating characteristics of the electromagnetic waves through the coupled-resonator optical waveguides based on the two-dimensional square-lattice photonic crystals by the finite-difference time-domain method. When the traditional circular rods adjacent to the centre of the cavities are replaced by the oval rods, the simulated results show that the waveguide mode region can be adjusted only by the alteration of the oval rods' obliquity. When the obliquity of the oval rods around one cavity is different from the obliquity of that around the adjacent cavities, the group velocities of the waveguide modes can be greatly reduced and the information of different frequencies can be shared and chosen at the same time by the waveguide branches with different structures. If the obliquities of the oval rods around two adjacent cavities are equal and they alternate between two values, the group velocities can be further reduced and a maximum value of 0.0008c (c is the light velocity in vacuum) can be acquired.

Abstract: This paper studies the propagating characteristics of the electromagnetic waves through the coupled-resonator optical waveguides based on the two-dimensional square-lattice photonic crystals by the finite-difference time-domain method. When the traditional circular rods adjacent to the centre of the cavities are replaced by the oval rods, the simulated results show that the waveguide mode region can be adjusted only by the alteration of the oval rods' obliquity. When the obliquity of the oval rods around one cavity is different from the obliquity of that around the adjacent cavities, the group velocities of the waveguide modes can be greatly reduced and the information of different frequencies can be shared and chosen at the same time by the waveguide branches with different structures. If the obliquities of the oval rods around two adjacent cavities are equal and they alternate between two values, the group velocities can be further reduced and a maximum value of 0.0008c (c is the light velocity in vacuum) can be acquired.

Key words: photonic crystal, waveguide, group velocity, the finite-difference time-domain method

中图分类号:  (Photonic bandgap materials)

  • 42.70.Qs
78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))