Topological resonance and single-optical-cycle valley polarization in gapped graphene

SA Oliaei Motlagh, F Nematollahi, V Apalkov… - Physical Review B, 2019 - APS
For gapped graphene, we predict that an intense ultrashort (single-oscillation) circularly
polarized optical pulse can induce a large population of the conduction band and a large …

Femtosecond valley polarization and topological resonances in transition metal dichalcogenides

SA Oliaei Motlagh, JS Wu, V Apalkov, MI Stockman - Physical Review B, 2018 - APS
We theoretically introduce the fundamentally fastest induction of a significant population and
valley polarization in a monolayer of a transition metal dichalcogenide (ie, MoS 2 and WS 2) …

High-harmonic generation in Su-Schrieffer-Heeger chains

H Jürß, D Bauer - Physical Review B, 2019 - APS
Su-Schrieffer-Heeger (SSH) chains are the simplest model systems that display topological
edge states. We calculate high-harmonic spectra of SSH chains that are coupled to an …

Ultrafast optical currents in gapped graphene

SAO Motlagh, F Nematollahi, A Mitra… - Journal of Physics …, 2019 - iopscience.iop.org
We theoretically study the interaction of ultrashort optical pulses with gapped graphene.
Such a strong pulse results in a finite conduction band population and a corresponding …

Robustness of topologically sensitive harmonic generation in laser-driven linear chains

H Drüeke, D Bauer - Physical Review A, 2019 - APS
A many-order-of-magnitude difference in the harmonic yield from the two topological phases
of finite, dimerizing linear chains in laser fields has recently been observed in all-electron …

Helicity flip of high-order harmonic photons in Haldane nanoribbons

H Jürß, D Bauer - Physical Review A, 2020 - APS
Recent studies in high-harmonic spectroscopy of condensed matter mainly focused on the
bulk of the system under consideration. In this work we investigate the response of thin …

Intense-laser-driven electron dynamics and high-order harmonic generation in solids including topological effects

D Moos, H Jürß, D Bauer - Physical Review A, 2020 - APS
A theory for laser-driven electron dynamics and high-harmonic generation in bulk solids with
two lattice sites per unit cell of arbitrary dimension is formulated. In tight-binding …

High-harmonic spectra of hexagonal nanoribbons from real-space time-dependent Schrödinger calculations

H Drüeke, D Bauer - The European Physical Journal Special Topics, 2021 - Springer
High-harmonic spectroscopy is a promising candidate for imaging electronic structures and
dynamics in condensed matter by all-optical means and with unprecedented temporal …

Intense anomalous high harmonics in graphene quantum dots caused by disorder or vacancies

HK Avetissian, GA Musayelyan, GF Mkrtchian - Physical Review B, 2024 - APS
This article aims to study the linear and nonlinear optical response of inversion symmetric
graphene quantum dots (GQDs) in the presence of on-site disorder or vacancies. The …

Fundamentally fastest optical processes at the surface of a topological insulator

SA Oliaei Motlagh, JS Wu, V Apalkov, MI Stockman - Physical Review B, 2018 - APS
We predict that a single oscillation of a strong optical pulse can significantly populate the
surface conduction band of a three-dimensional topological insulator, Bi 2 Se 3. Both …