Volume 130, Number 4, May 2020
|Number of page(s)||4|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||11 June 2020|
Evolution of accidental degenerate Dirac point in 2D photonic crystals
Center for Theoretical Physics, Department of Physics, Capital Normal University - Beijing, 100048, China
Received: 17 April 2020
Accepted: 26 May 2020
In this paper, the evolution of accidental degenerate Dirac points in two-dimensional photonic crystals (PCs) is studied. By adjusting the structural parameters of the PC, a series of new Dirac points can be obtained. The fitting formula describing the relationship between the parameters of the Dirac points is given, and the corresponding functional relationship between the frequency of Dirac points and the structural parameters can also be obtained. We further find that there is no corresponding Dirac point in the “inverted” structure. It is believed that this new discovery will provide an important guidance for practical application.
PACS: 42.70.Qs – Photonic bandgap materials / 11.55.Fv – Dispersion relations
© EPLA, 2020
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