date: 2018-09-30T09:03:40Z
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pdf:docinfo:title: Ab Initio Simulation of Attosecond Transient Absorption Spectroscopy in Two-Dimensional Materials
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subject: We extend the first-principles analysis of attosecond transient absorption spectroscopy to two-dimensional materials. As an example of two-dimensional materials, we apply the analysis to monolayer hexagonal boron nitride (h-BN) and compute its transient optical properties under intense few-cycle infrared laser pulses. Nonadiabatic features are observed in the computed transient absorption spectra. To elucidate the microscopic origin of these features, we analyze the electronic structure of h-BN with density functional theory and investigate the dynamics of specific energy bands with a simple two-band model. Finally, we find that laser-induced intraband transitions play a significant role in the transient absorption even for the two-dimensional material and that the nonadiabatic features are induced by the dynamical Franz?Keldysh effect with an anomalous band dispersion. 
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dc:title: Ab Initio Simulation of Attosecond Transient Absorption Spectroscopy in Two-Dimensional Materials
modified: 2018-09-30T09:03:40Z
cp:subject: We extend the first-principles analysis of attosecond transient absorption spectroscopy to two-dimensional materials. As an example of two-dimensional materials, we apply the analysis to monolayer hexagonal boron nitride (h-BN) and compute its transient optical properties under intense few-cycle infrared laser pulses. Nonadiabatic features are observed in the computed transient absorption spectra. To elucidate the microscopic origin of these features, we analyze the electronic structure of h-BN with density functional theory and investigate the dynamics of specific energy bands with a simple two-band model. Finally, we find that laser-induced intraband transitions play a significant role in the transient absorption even for the two-dimensional material and that the nonadiabatic features are induced by the dynamical Franz?Keldysh effect with an anomalous band dispersion. 
pdf:docinfo:subject: We extend the first-principles analysis of attosecond transient absorption spectroscopy to two-dimensional materials. As an example of two-dimensional materials, we apply the analysis to monolayer hexagonal boron nitride (h-BN) and compute its transient optical properties under intense few-cycle infrared laser pulses. Nonadiabatic features are observed in the computed transient absorption spectra. To elucidate the microscopic origin of these features, we analyze the electronic structure of h-BN with density functional theory and investigate the dynamics of specific energy bands with a simple two-band model. Finally, we find that laser-induced intraband transitions play a significant role in the transient absorption even for the two-dimensional material and that the nonadiabatic features are induced by the dynamical Franz?Keldysh effect with an anomalous band dispersion. 
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Keywords: attosecond transient absorption spectroscopy; time-dependent density functional theory; first-principles simulation
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title: Ab Initio Simulation of Attosecond Transient Absorption Spectroscopy in Two-Dimensional Materials
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pdf:docinfo:keywords: attosecond transient absorption spectroscopy; time-dependent density functional theory; first-principles simulation
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dc:subject: attosecond transient absorption spectroscopy; time-dependent density functional theory; first-principles simulation
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meta:keyword: attosecond transient absorption spectroscopy; time-dependent density functional theory; first-principles simulation
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