Markus Lysne
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View article: High harmonic generation in altermagnets
High harmonic generation in altermagnets Open
We study high harmonic generation in altermagnetic metals with and without spin-orbit coupling. The altermagnetism manifests itself in the magnetic field dependence of the low harmonics associated with intra-band dynamics. Spin-orbit coupl…
View article: Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals
Spin-orbit interaction driven terahertz nonlinear dynamics in transition metals Open
The interplay of electric charge, spin, and orbital polarizations, coherently driven by picosecond long oscillations of light fields in spin-orbit coupled systems, is the foundation of emerging terahertz spintronics and orbitronics. The es…
View article: Quantum optics measurement scheme for quantum geometry and topological invariants
Quantum optics measurement scheme for quantum geometry and topological invariants Open
We show how a quantum optical measurement scheme based on heterodyne detection can be used to explore geometrical and topological properties of condensed matter systems. Considering a 2D material placed in a cavity with a coupling to the e…
View article: Nonlinear optical processes in cavity light-matter systems
Nonlinear optical processes in cavity light-matter systems Open
We study non-linear optical effects in electron systems with and without\ninversion symmetry in a Fabry-Perot cavity. General photon up- and\ndown-conversion processes are modeled by the coupling of a noninteracting\nlattice model to two m…
View article: High-harmonic generation in spin-orbit coupled systems
High-harmonic generation in spin-orbit coupled systems Open
We study high-harmonic generation in two-dimensional electron systems with\nRashba and Dresselhaus spin-orbit coupling and derive harmonic generation\nselection rules with the help of group theory. Based on the bandstructures of\nthese min…
View article: Signatures of bosonic excitations in high-harmonic spectra of Mott insulators
Signatures of bosonic excitations in high-harmonic spectra of Mott insulators Open
The high harmonic spectrum of the Mott insulating Hubbard model has recently\nbeen shown to exhibit plateau structures with cutoff energies determined by\n$n$th nearest neighbor doublon-holon recombination processes. The spectrum thus\nall…
View article: High Harmonic Generation in Strongly Correlated Systems
High Harmonic Generation in Strongly Correlated Systems Open
In recent years, the study of phenomena pertaining to non-linear properties of materials has seen a major upswing - especially in the context of High Harmonic Generation (HHG). In this thesis, an account of the current state of research in…