Variation of group velocity and complete bandgaps in two-dimensional photonic crystals with drilling holes into the dielectric rods

  • Liu W
  • Yang T
  • 5


    Mendeley users who have this article in their library.
  • 2


    Citations of this article.


Two-dimensional square lattices of square cross-section dielectric rods in air, designed with an air hole drilled into each square rod, are studied theoretically. By adjusting the shift of the hole position in the square rod in each unit cell, the dielectric distribution of the square rod will be modified. A sizable complete band gap occurs for certain structural parameters and exhibits very flat photonic bands near such gap edge, which resulting in a sharp peak of density of states. In addition, the zero or small group velocities are observed in a broad region of k-space. This structure can be fabricated with materials widely used today and opens a fascinating area for applications in optoelectric devices. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Density of states
  • Group velocity
  • Photonic band gap
  • Photonic crystals

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Wen Long Liu

  • Tzong Jer Yang

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free