Applied Physics A

, 125:298 | Cite as

Study on the velocity band gap characteristics of photonic crystal under the relativistic conditions

  • Jian-Xiao Liu
  • Lu Ju
  • Yu-Jie Liu
  • Hong-Wei YangEmail author
  • Wan-Chun TangEmail author


The periodic dielectric slabs are investigated. The reflection and transmission characteristics of electromagnetic wave are researched when photonic crystals are moved at a uniform velocity close to the light speed under the relativistic conditions. When the motion direction of photonic crystal is perpendicular to the propagation direction of electromagnetic wave, the electromagnetic band gap is formed alternately by the reflection spectrum of photonic crystal changed with velocity. The gap is different from the traditional electromagnetic band gap, which is not a function of the spectrum but corresponding to the velocity. The peculiar phenomenon generated by electromagnetic wave at different velocity band is called velocity band gap. The velocity band gap is affected by the frequency of electromagnetic wave, period of photonic crystal, permittivity and other parameters. It varies periodically in the whole velocity range and decreases with the increasing velocity. The velocity band gap is expanded and moved to the low velocity interval with the period of photonic crystal increasing. When the difference in permittivity of the two adjacent dielectric slabs becomes higher and the frequency of electromagnetic wave increases, the velocity band gap is changed accordingly. The change is similar to the state in which a spring fixed at one end is stretched, but the change in velocity band gap is not uniform.



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© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Physics Science and TechnologyNanjing Normal UniversityNanjingPeople’s Republic of China
  2. 2.School of Electronics and Information EngineeringHengshui UniversityHengshuiPeople’s Republic of China
  3. 3.Department of Physics, College of ScienceNanjing Agricultural UniversityNanjingPeople’s Republic of China

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