中国物理B ›› 2017, Vol. 26 ›› Issue (4): 44208-044208.doi: 10.1088/1674-1056/26/4/044208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Numerical study on characteristic of two-dimensional metal/dielectric photonic crystals

Yi-Xin Zong(宗易昕), Jian-Bai Xia(夏建白), Hai-Bin Wu(武海斌)   

  1. State Key Laboratory of Semiconductor Materials, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2016-09-05 修回日期:2016-11-24 出版日期:2017-04-05 发布日期:2017-04-05
  • 通讯作者: Yi-Xin Zong, Jian-Bai Xia E-mail:yxzong@semi.ac.cn;jbxia@semi.ac.cn
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB922200) and the National Natural Science Foundation of China (Grant No. 605210010).

Numerical study on characteristic of two-dimensional metal/dielectric photonic crystals

Yi-Xin Zong(宗易昕), Jian-Bai Xia(夏建白), Hai-Bin Wu(武海斌)   

  1. State Key Laboratory of Semiconductor Materials, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • Received:2016-09-05 Revised:2016-11-24 Online:2017-04-05 Published:2017-04-05
  • Contact: Yi-Xin Zong, Jian-Bai Xia E-mail:yxzong@semi.ac.cn;jbxia@semi.ac.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2011CB922200) and the National Natural Science Foundation of China (Grant No. 605210010).

摘要: An improved plan-wave expansion method is adopted to theoretically study the photonic band diagrams of two-dimensional (2D) metal/dielectric photonic crystals. Based on the photonic band structures, the dependence of flat bands and photonic bandgaps on two parameters (dielectric constant and filling factor) are investigated for two types of 2D metal/dielectric (M/D) photonic crystals, hole and cylinder photonic crystals. The simulation results show that band structures are affected greatly by these two parameters. Flat bands and bandgaps can be easily obtained by tuning these parameters and the bandgap width may reach to the maximum at certain parameters. It is worth noting that the hole-type photonic crystals show more bandgaps than the corresponding cylinder ones, and the frequency ranges of bandgaps also depend strongly on these parameters. Besides, the photonic crystals containing metallic medium can obtain more modulation of photonic bands, band gaps, and large effective refractive index, etc. than the dielectric/dielectric ones. According to the numerical results, the needs of optical devices for flat bands and bandgaps can be met by selecting the suitable geometry and material parameters.

关键词: photonic crystal, plane-wave expansion method, flat band, photonic bandgap

Abstract: An improved plan-wave expansion method is adopted to theoretically study the photonic band diagrams of two-dimensional (2D) metal/dielectric photonic crystals. Based on the photonic band structures, the dependence of flat bands and photonic bandgaps on two parameters (dielectric constant and filling factor) are investigated for two types of 2D metal/dielectric (M/D) photonic crystals, hole and cylinder photonic crystals. The simulation results show that band structures are affected greatly by these two parameters. Flat bands and bandgaps can be easily obtained by tuning these parameters and the bandgap width may reach to the maximum at certain parameters. It is worth noting that the hole-type photonic crystals show more bandgaps than the corresponding cylinder ones, and the frequency ranges of bandgaps also depend strongly on these parameters. Besides, the photonic crystals containing metallic medium can obtain more modulation of photonic bands, band gaps, and large effective refractive index, etc. than the dielectric/dielectric ones. According to the numerical results, the needs of optical devices for flat bands and bandgaps can be met by selecting the suitable geometry and material parameters.

Key words: photonic crystal, plane-wave expansion method, flat band, photonic bandgap

中图分类号:  (Photonic bandgap materials)

  • 42.70.Qs
02.60.Cb (Numerical simulation; solution of equations) 78.66.Bz (Metals and metallic alloys) 41.20.Jb (Electromagnetic wave propagation; radiowave propagation)