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Optoelectronics Letters

, Volume 7, Issue 2, pp 105–108 | Cite as

Study of whispering-gallery-mode in a photonic crystal microcavity

  • Guang-yu Liu (刘光裕)
  • Yong-qiang Ning (宁永强)Email author
  • Xiao-dong Qi (戚晓东)
  • Yan Zhang (张岩)
  • Zhen-fu Wang (王贞福)
  • Xing Zhang (张星)
  • Jing-jing Shi (史晶晶)
  • Li-sen Zhang (张立森)
  • Wei Wang (王伟)
  • Yan-fang Sun (孙艳芳)
  • Jin-jiang Cui (崔锦江)
  • Li Qin (秦莉)
  • Yun Liu (刘云)
  • Lijun Wang (王立军)
Article
  • 112 Downloads

Abstract

The whispering-gallery-mode (WGM) photonic crystal microcavity can be potentially used for miniaturized photonic devices, such as thresholdless lasers. In this paper, we use plane wave expansion (PWE) method and study the WGM of H2 photonic crystal microcavities which are formed by removing seven center air holes in a photonic crystal. The WGM in these large-size cavities has some advantages compared with single defect WGM in the view of real device applications. We analyze the nearby air hole effect on WGM and conclude that WGM is more sensitive to moving towards the outside rather than moving towards the inside of a nearby air hole. In our case, if a nearby air hole is moved 0.1a away from the center, the WGM will disappear. If a nearby air hole is moved 0.6a towards the center, however, the WGM will still exit. We also analyze the structure with an air hole (r m= 0.2a) in the center of the microcavity, and we find that the WGM is not affected by the central hole sensitively. As we increase r m, the WGM remains unchanged until r m is 0.64 times greater than period a. It is found that the tolerance of WGM to the displacement of nearby air holes and the occurance of central holes is large enough to fabricate electrical injection structure.

Keywords

Photonic Crystal Triangular Lattice Plane Wave Expansion Plane Wave Expansion Method Photonic Crystal Microcavity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Tianjin University of Technology and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Guang-yu Liu (刘光裕)
    • 1
    • 2
  • Yong-qiang Ning (宁永强)
    • 1
    Email author
  • Xiao-dong Qi (戚晓东)
    • 4
  • Yan Zhang (张岩)
    • 1
    • 2
  • Zhen-fu Wang (王贞福)
    • 1
    • 2
  • Xing Zhang (张星)
    • 1
    • 2
  • Jing-jing Shi (史晶晶)
    • 1
    • 2
  • Li-sen Zhang (张立森)
    • 1
    • 2
  • Wei Wang (王伟)
    • 1
    • 2
  • Yan-fang Sun (孙艳芳)
    • 1
  • Jin-jiang Cui (崔锦江)
    • 3
  • Li Qin (秦莉)
    • 1
  • Yun Liu (刘云)
    • 1
  • Lijun Wang (王立军)
    • 1
  1. 1.Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina
  2. 2.Graduate UniversityChinese Academy of SciencesBeijingChina
  3. 3.Suzhou Institute of Biomedical Engineering and TechnologyChinese Academy of SciencesSuzhouChina
  4. 4.Department of PhysicsQueen’s UniversityKingstonCanada

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