Manipulation of the dielectric properties of diamond by an ultrashort laser pulse

Zhang, Xiaoqin; Wang, Feng; Jiang, Lan; Yao, Yugui

doi:10.1103/physrevb.95.184301

Cited by 28 publications

(26 citation statements)

References 34 publications

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“…Finally, let us remark that strong-field-induced anisotropy was recently predicted several times in time-dependent density-functional-theory (TDDFT) simulations [34][35][36]. However, this type of anisotropy is quite different from the (apparent) anisotropy reported here; in TDDFT, anisotropy emerges because a linearly polarized pump field produces an inhomogeneous distribution of excited carriers in reciprocal space, an effect which is expected to diminish after 1-100 fs associated with the carrier-momentum relaxation time in a strongly excited solid [37].…”

Section: B Ultrafast Drop In R Pmentioning

confidence: 81%

Transient optical properties of highly excited dielectric materials: Apparent birefringence and delayed reflectivity increase

Möller

Andersen

Balling

2020

Phys. Rev. Research

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The ultrafast dynamics of short-pulse-laser-excited fused silica is investigated by measuring polarizationresolved reflectances of a wavelength-tunable probe pulse following a near-infrared pump pulse. These data, which should, in principle, allow the determination of both real and imaginary parts of the time-dependent electric permittivity, turn out to become incompatible with an isotropic optical response after ∼200 fs. This is reconciled with a uniaxial permittivity tensor, which predicts greatly enhanced absorption of p-polarized light, suggesting that an absorption channel is missing in the standard optical models for strongly excited dielectrics. The timescale for the excitation-induced variations in the optical properties exhibits a wavelength dependence that can be explained qualitatively by Pauli blocking in the electronic band structure.

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Section: B Ultrafast Drop In R Pmentioning

confidence: 81%

Transient optical properties of highly excited dielectric materials: Apparent birefringence and delayed reflectivity increase

Möller

Andersen

Balling

2020

Phys. Rev. Research

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“…Otobe [6] has shown the intensity of individual emitted HHG of perfect bulk diamond increases nonlinearly with laser intensity through timedependent density functional theory (TDDFT). Zhang et al [7] have investigated the electron dynamics and dielectric modulation of diamond by intense single-cycle laser in the framework of time-dependent DFT. Their results demonstrate that tailored laser parameter can effectively manipulate the dielectric properties of wide bandgap materials.…”

Section: Introductionmentioning

confidence: 99%

Transient non-linear optics of diamond under ultrashort excitation pulses

2021

Self Cite

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Electronic response of crystalline diamond as well as high harmonic generation following irradiation by a single-cycle highintensity laser pulse was calculated through modeling the dynamics in the framework of the time-dependent density functional theory. The frequencies of the applied laser pulses vary over visible regime with a timescale shorter than typical quantum dephasing. High harmonic yields, show substantial deviation from what is obtained from the power scaling law of perfect solids under longer cycle pulses due to the key role of strong nonlinear features of dynamics at high intensities. Further, the dynamical photon dressing of electronic states are monitored by Floquet quasi-static picture for ultrashort few cycle pulses. Our results show that dynamical bandgap is diminished as a function of increasing driven field frequency and the system changes into the dynamic metallization regimes that consequently leads to new hybridization of quasi static dressed bands particularly near high symmetrical points in the Brillouin zone. These Floquet hybridization can be used to produce coherent transport of charge on the scale of the huge number of lattice sites. Moreover, the pulse-induced phonon frequency variations that relate to bond softening and hardening, are connected to different order of Floquet dressed states. Importantly, it is found that dielectric response oscillation is directly proportional to the transient bandgap value so that entering into metallization mode preserves the polarization coherency. Based on the magnitude of calculated Keldysh parameter varies for dynamical bandgap, tunneling ionization is the dominant mechanism of excitation.

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“…Recently, extensions of time-dependent density functional theory have also been proposed to treat light and matter simultaneously on a quantized level [40,41]. The different levels of computational approaches have been used to describe laser irradiation [42], dielectric response [43,44] high harmonic generation in solids [45,46], the dynamical Franz-Keldysh effect [47], attosecond band gap dynamics [48], local currents [49,50], Rabi splittings of infrared spectra for molecules in optical cavities [51], modification of excitation and charge transfer in optical cavities [52], photoemission [53], and Coulomb explosion as well as ionization [54,55].…”

Section: Introductionmentioning

confidence: 99%

Time propagation of the coupled Maxwell and Kohn-Sham equations using the Riemann-Silberstein formalism

et al. 2019

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Manipulation of the dielectric properties of diamond by an ultrashort laser pulse

Cited by 28 publications

References 34 publications

Transient optical properties of highly excited dielectric materials: Apparent birefringence and delayed reflectivity increase

Transient optical properties of highly excited dielectric materials: Apparent birefringence and delayed reflectivity increase

Transient non-linear optics of diamond under ultrashort excitation pulses

Time propagation of the coupled Maxwell and Kohn-Sham equations using the Riemann-Silberstein formalism

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