Research paperTheoreticalComputed RamanPhotocurrent generation in solids via linearly polarized laserAmar Bharti, Gopal Dixit2024·10.1103/PhysRevB.109.104309·arXiv:2403.12508AbstractTo add to the rapidly progressing field of ultrafast photocurrent, we propose a universal method to generate photocurrent in normal and topological materials using a pair of multicycle linearly polarized laser pulses. The interplay of the fundamental and its second harmonic pulses is studied for the generation of photocurrent in Weyl semimetals by varying the angle between the polarization direction, relative intensity, and relative phase delay. It has been found that the presence of a comparatively weaker second harmonic pulse is sufficient to generate substantial photocurrent. Moreover, significant photocurrent is generated even when polarization directions are orthogonal for certain ratios of the lasers’ intensities. In addition, the photocurrent is found to be susceptible to the delay between the two pulses. We have illustrated that all our findings are extendable to non-topological and two-dimensional materials, such as graphene and molybdenum disulfide.Read more
Tight-binding model of an inversion-symmetric Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-symmetric Weyl semimetalStudied MaterialExpand
Tight-binding model of an inversion-broken Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-broken Weyl semimetalStudied MaterialExpand
Graphene tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedCStudied MaterialExpand
MoS₂ tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedMoS₂Studied MaterialExpand
Research paperTheoreticalComputed RamanPhotocurrent generation in solids via linearly polarized laserAmar Bharti, Gopal Dixit2024·10.1103/PhysRevB.109.104309·arXiv:2403.12508AbstractTo add to the rapidly progressing field of ultrafast photocurrent, we propose a universal method to generate photocurrent in normal and topological materials using a pair of multicycle linearly polarized laser pulses. The interplay of the fundamental and its second harmonic pulses is studied for the generation of photocurrent in Weyl semimetals by varying the angle between the polarization direction, relative intensity, and relative phase delay. It has been found that the presence of a comparatively weaker second harmonic pulse is sufficient to generate substantial photocurrent. Moreover, significant photocurrent is generated even when polarization directions are orthogonal for certain ratios of the lasers’ intensities. In addition, the photocurrent is found to be susceptible to the delay between the two pulses. We have illustrated that all our findings are extendable to non-topological and two-dimensional materials, such as graphene and molybdenum disulfide.Read more
Tight-binding model of an inversion-symmetric Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-symmetric Weyl semimetalStudied MaterialExpand
Tight-binding model of an inversion-broken Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-broken Weyl semimetalStudied MaterialExpand
Graphene tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedCStudied MaterialExpand
MoS₂ tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedMoS₂Studied MaterialExpand
Research paperTheoreticalComputed RamanPhotocurrent generation in solids via linearly polarized laserAmar Bharti, Gopal Dixit2024·10.1103/PhysRevB.109.104309·arXiv:2403.12508AbstractTo add to the rapidly progressing field of ultrafast photocurrent, we propose a universal method to generate photocurrent in normal and topological materials using a pair of multicycle linearly polarized laser pulses. The interplay of the fundamental and its second harmonic pulses is studied for the generation of photocurrent in Weyl semimetals by varying the angle between the polarization direction, relative intensity, and relative phase delay. It has been found that the presence of a comparatively weaker second harmonic pulse is sufficient to generate substantial photocurrent. Moreover, significant photocurrent is generated even when polarization directions are orthogonal for certain ratios of the lasers’ intensities. In addition, the photocurrent is found to be susceptible to the delay between the two pulses. We have illustrated that all our findings are extendable to non-topological and two-dimensional materials, such as graphene and molybdenum disulfide.Read more
Tight-binding model of an inversion-symmetric Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-symmetric Weyl semimetalStudied MaterialExpand
Tight-binding model of an inversion-broken Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-broken Weyl semimetalStudied MaterialExpand
Graphene tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedCStudied MaterialExpand
MoS₂ tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedMoS₂Studied MaterialExpand
Research paperTheoreticalComputed RamanPhotocurrent generation in solids via linearly polarized laserAmar Bharti, Gopal Dixit2024·10.1103/PhysRevB.109.104309·arXiv:2403.12508AbstractTo add to the rapidly progressing field of ultrafast photocurrent, we propose a universal method to generate photocurrent in normal and topological materials using a pair of multicycle linearly polarized laser pulses. The interplay of the fundamental and its second harmonic pulses is studied for the generation of photocurrent in Weyl semimetals by varying the angle between the polarization direction, relative intensity, and relative phase delay. It has been found that the presence of a comparatively weaker second harmonic pulse is sufficient to generate substantial photocurrent. Moreover, significant photocurrent is generated even when polarization directions are orthogonal for certain ratios of the lasers’ intensities. In addition, the photocurrent is found to be susceptible to the delay between the two pulses. We have illustrated that all our findings are extendable to non-topological and two-dimensional materials, such as graphene and molybdenum disulfide.Read more
Tight-binding model of an inversion-symmetric Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-symmetric Weyl semimetalStudied MaterialExpand
Tight-binding model of an inversion-broken Weyl semimetal used for density-matrix photocurrent simulation.No measurements recordedSimulatedinversion-broken Weyl semimetalStudied MaterialExpand
Graphene tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedCStudied MaterialExpand
MoS₂ tight-binding model discussed as an extension of the photocurrent mechanism.No measurements recordedSimulatedMoS₂Studied MaterialExpand
