Zobrazeno 1 - 10
of 426
pro vyhledávání: '"Motlagh S"'
Autor:
Motlagh S. Azar Oliaei, Apalkov Vadym
Publikováno v:
Nanophotonics, Vol 10, Iss 14, Pp 3677-3685 (2021)
We propose an ultrafast all-optical anomalous Hall effect in two-dimensional (2D) semiconductors of hexagonal symmetry such as gapped graphene (GG), transition metal dichalcogenides (TMDCs), and hexagonal boron nitride (h-BN). To induce such an effec
Externí odkaz:
https://doaj.org/article/f49c0c1239db4aebae53994ba057b9d8
Publikováno v:
Phys. Rev. B 103, 155416 (2021)
We theoretically study the interaction of an ultrafast intense linearly polarized optical pulse with monolayers of transition metal dichalcogenides (TMDCs). Such a strong pulse redistributes electrons between the bands and generates femtosecond curre
Externí odkaz:
http://arxiv.org/abs/2011.07345
We propose an ultrafast all-optical anomalous Hall effect in two-dimensional (2D) semiconductors of hexagonal symmetry such as gapped graphene (GG), transition metal dichalcogenides (TMDCs), and hexagonal boron nitride (h-BN). To induce such an effec
Externí odkaz:
http://arxiv.org/abs/2007.12757
Autor:
Motlagh, S. Azar Oliaei, Zafar, Ahmal Jawad, Mitra, Aranyo, Apalkov, Vadym, Stockman, Mark I.
Publikováno v:
Phys. Rev. B 101, 165433 (2020)
We study theoretically the strong-field absorption of an ultrafast optical pulse by a gapped graphene monolayer. At low field amplitudes, the absorbance in the pristine graphene is equal to the universal value of $2.3$ percent. Although the ultrafast
Externí odkaz:
http://arxiv.org/abs/2001.05410
Publikováno v:
In Building and Environment 1 October 2023 244
Publikováno v:
Phys. Rev. B 100, 115431 (2019)
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 valley polarization. With an increase in the bandgap, the magnitude of
Externí odkaz:
http://arxiv.org/abs/1909.03095
Autor:
Motlagh, S. Azar Oliaei, Nematollahi, Fatemeh, Mitra, Aranyo, Zafar, Ahmal Jawad, Apalkov, Vadym, Stockman, Mark I.
We study theoretically the interaction of ultrashort optical pulses with gapped graphene. Such strong pulse results in finite conduction band population and corresponding electric current both during and after the pulse. Since gapped graphene has bro
Externí odkaz:
http://arxiv.org/abs/1908.09019
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 the amplitude of ~ 0.1 - 0.5 $\mathrm{V/\AA}$. The waveform of the pul
Externí odkaz:
http://arxiv.org/abs/1908.09024
Autor:
Nematollahi, Fatemeh, Motlagh, S. Azar Oliaei, Wu, Jhih-Sheng, Ghimire, Rupesh, Apalkov, Vadym, Stockman, Mark. I.
Publikováno v:
Phys. Rev. B 102, 125413 (2020)
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 governed by topological resonance, which manifests itself as a specific cond
Externí odkaz:
http://arxiv.org/abs/1903.01657
In the model of gapped graphene, we have shown how the recently predicted topological resonances are solely related to the presence of an energy band gap at the $K$ and $K^\prime$ points of the Brillouin zone. In the field of a strong single-oscillat
Externí odkaz:
http://arxiv.org/abs/1812.08812