3 papers
cond-mat.mtrl-sci2026
Multi-photon schemes for mid-infrared detection
Alistair H. Duff, J. E. Sipe
We calculate the theoretical non-degenerate two photon absorption and three color injected current response tensors for bulk GaAs and GeSn for a range of alloy composit…
cond-mat.mes-hall2025
Frequency Dependent Magnetic Susceptibility and the effective conductivity tensor
Alistair H. Duff, J. E. Sipe
We apply a microscopic formalism for the calculation of material response properties to the problem of the generalization of a first-principles, i.e based on the energy spectrum an…
cond-mat.mes-hall2025
Linear response of a Chern insulator to finite-frequency electric fields
Jason G. Kattan, Alistair H. Duff, J. E. Sipe
We derive the macroscopic charge and current densities of a Chern insulator initially occupying its electronic ground state as it responds to a finite-frequency electric field; we…