Topological resonance and single-optical-cycle valley polarization in gapped graphene
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 …
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
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) …
valley polarization in a monolayer of a transition metal dichalcogenide (ie, MoS 2 and WS 2) …
High-harmonic generation in Su-Schrieffer-Heeger chains
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 …
edge states. We calculate high-harmonic spectra of SSH chains that are coupled to an …
Ultrafast optical currents in gapped graphene
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 …
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
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 …
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
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 …
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
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 …
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
High-harmonic spectroscopy is a promising candidate for imaging electronic structures and
dynamics in condensed matter by all-optical means and with unprecedented temporal …
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 …
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
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 …
surface conduction band of a three-dimensional topological insulator, Bi 2 Se 3. Both …