Generalized Gilat–Raubenheimer method for density-of-states calculation in photonic crystals
Author(s)Liu, Boyuan; Lu, Ling; Johnson, Steven G.; Joannopoulos, John D.
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An efficient numerical algorithm is the key for accurate evaluation of density of states (DOS) in band theory. The Gilat-Raubenheimer (GR) method proposed in 1966 is an efficient linear extrapolation method which was limited in specific lattices. Here, using an affine transformation, we provide a new generalization of the original GR method to any Bravais lattices and show that it is superior to the tetrahedron method and the adaptive Gaussian broadening method. Finally, we apply our generalized GR method to compute DOS of various gyroid photonic crystals of topological degeneracies. Keywords: density of states, photonic crystal, topological photonics
DepartmentMassachusetts Institute of Technology. Department of Mathematics; Massachusetts Institute of Technology. Department of Physics
Journal of Optics
Liu, Boyuan, et al. “Generalized Gilat–Raubenheimer Method for Density-of-States Calculation in Photonic Crystals.” Journal of Optics, vol. 20, no. 4, Apr. 2018, p. 044005. Journal of Optics 20, no. 4 (April 1, 2018): 044005.
Author's final manuscript