First Principles Calculation of Topological Invariants by Means of the Photonic Green's Function
Prudêncio, F.
;
Silveirinha, M. G.
First Principles Calculation of Topological Invariants by Means of the Photonic Green's Function, Proc The International Conference on Metamaterials, Photonic Crystals and Plasmonics META, Lisbon, Portugal, Vol. 0, pp. 1 - 1, July, 2019.
Digital Object Identifier:
Abstract
The Chern topological numbers of a material platform are usually written in terms of the Berry curvature which depends on the normal modes of the system. Here, we use a gauge invariant Green’s function method to determine from “first principles” the topological invariants of photonic crystals. The proposed formalism does not require the calculation of the photonic band-structure, and can be easily implemented using the operators obtained with a standard plane-wave expansion.
