4 papers
Topology of Bloch Bands from Cauchy Data
Didier Felbacq, Emmanuel Rousseau
In a previous work, the topology of inversion-symmetric one-dimensional periodic media was characterized through the pole-zero pattern of an impedance-like function associated with…
Comment on ``Near-field spin Chern number quantized by real-space topology of optical structures''
Didier Felbacq, Emmanuel Rousseau
In the reference Phys. Rev. Lett. 132, 233801 (2024), the authors claim to have introduced a ''real-space spin Chern number'' as well as a ''Spin Berry connection'' and a ''Spin Be…
Characterizing the topological properties of one-dimensional non-hermitian systems without the Berry-Zak phase
Didier Felbacq, Emmanuel Rousseau
A new method is proposed to predict the topological properties of one-dimensional periodic structures in wave physics, including quantum mechanics. From Bloch waves, a unique compl…
A single layer representation of the scattered field for multiple scattering problems
Didier Felbacq, Anthony Gourdin, Emmanuel Rousseau
The scattering of scalar waves by a set of scatterers is considered. It is proven that the scattered field can be represented as an integral supported by any smooth surface enclosi…