858 citations · 2.6k across the 39 of their papers we have counts for
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Topological Nanospaser
Rupesh Ghimire, Jhih-Sheng Wu, Vadym Apalkov +1
We propose a nanospaser made of an achiral plasmonic-metal nanodisk and a two-dimensional chiral gain medium -- a monolayer transition-metal dichalcogenide (TMDC). When one valley…
Topological Spaser
Jhih-Sheng Wu, Vadym Apalkov, Mark I. Stockman
We theoretically introduce a topological spaser, which consists of a hexagonal array of plasmonic metal nanoshells containing an achiral gain medium in their cores. Such a spaser c…
Topological resonance and single-optical-cycle valley polarization in gapped graphene
S. Azar Oliaei Motlagh, Fatemeh Nematollahi, Vadym Apalkov +1
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…
Laser pulse waveform control of Dirac fermions in graphene
S. Azar Oliaei Motlagh, Vadym Apalkov, Mark I. Stockman
We theoretically study the Dirac fermion dynamics in a graphene monolayer in the presence of an applied ultrafast laser pulse. The pulse has the duration of a few femtoseconds and…
Ultrafast optical currents in gapped graphene
S. Azar Oliaei Motlagh, Fatemeh Nematollahi, Aranyo Mitra +3
We study theoretically the interaction of ultrashort optical pulses with gapped graphene. Such strong pulse results in finite conduction band population and corresponding electric…
Topological resonance in Weyl semimetals in circularly-polarized optical pulse
Fatemeh Nematollahi, S. Azar Oliaei Motlagh, Jhih-Sheng Wu +3
We study theoretically the ultrafast electron dynamics of three-dimensional Weyl semimetals in the field of a laser pulse. For a circularly-polarized pulse, such dynamics is govern…