Transient response of dielectric materials exposed to ultrafast laser radiation

Winkler, Sebastian; Burakov, Igor M.; Stoian, Razvan; Bulgakova, Nadezhda M.; Husakou, Anton; Mermillod–Blondin, Alexandre; Rosenfeld, A.; Ashkenasi, David; Hertel, I. V.

doi:10.1007/s00339-006-3644-7

Cited by 67 publications

(73 citation statements)

References 65 publications

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“…The orbitals at time t+∆t are computed by applying Eq. (27) to the orbitals at time t. The Kohn-Sham operator H is a function of the fields φ, A, and the density. We use a fixed-time Hamiltonian H in which the scalar potential and the density are taken at time t and the field A is taken to be (A(t) + A(t + ∆t))/2.…”

Section: B Electronic Scalementioning

confidence: 99%

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Time-dependent density functional theory for strong electromagnetic fields in crystalline solids

et al. 2012

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We apply the coupled dynamics of time-dependent density functional theory and Maxwell equations to the interaction of intense laser pulses with crystalline silicon. As a function of electromagnetic field intensity, we see several regions in the response. At the lowest intensities, the pulse is reflected and transmitted in accord with the dielectric response, and the characteristics of the energy deposition is consistent with two-photon absorption. The absorption process begins to deviate from that at laser intensities ∼ 10 13 W/cm 2 , where the energy deposited is of the order of 1 eV per atom. Changes in the reflectivity are seen as a function of intensity. When it passes a threshold of about 3 × 10 12 W/cm 2 , there is a small decrease. At higher intensities, above 2 × 10 13 W/cm 2 , the reflectivity increases strongly. This behavior can be understood qualitatively in a model treating the excited electron-hole pairs as a plasma.

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Section: B Electronic Scalementioning

confidence: 99%

“…Experimentally, electron-hole plasmas are generated by irradiating solids with strong laser pulses, and the threshold for dielectric breakdown has been measured [18][19][20][21][22][23][24][25][26][27] . To describe the phenomena, model approaches such as a rate equation for electronic excitations have been developed [28][29][30][31][32][33] .…”

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confidence: 99%

Time-dependent density functional theory for strong electromagnetic fields in crystalline solids

et al. 2012

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“…It has been shown that the use of ultrashort laser pulses allows for a variety of modifications to highly localized regions both on the surface and in the bulk of transparent materials [13][14][15][16][17][18][19]. An understanding of the field-matter interactions leading to such modifications is essential for the development of new applications.…”

Section: Introductionmentioning

confidence: 99%

“…While damage is a visible record of the pulse-plasma interaction, it is the initial interaction itself and resulting ultrafast free-electron generation that must be understood and controlled when using femtosecond pulses. * Numerous studies have included a postmortem analysis of the optical damage on the surface and in the bulk and used a wide variety of computer simulations to interpret the results [8,19,[22][23][24][25][26][27]. While those studies have greatly advanced the understanding of the induced-plasma processes and the nonlinear effects inside the material above the damage threshold, physical processes leading up to the damage regime are not accessible with many of these experimental techniques.…”

Section: Introductionmentioning

confidence: 99%

Interaction of ultrashort-laser pulses with induced undercritical plasmas in fused silica

et al. 2012

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R. 2012. Interaction of ultrashort-laser pulses with induced undercritical plasmas in fused silica. Phys Rev A, 85(1):013808.PHYSICAL REVIEW A 85, 013808 (2012) Interaction of ultrashort-laser pulses with induced undercritical plasmas in fused silica Ultrafast light-material interactions near the damage threshold are often studied using postmortem analysis of damaged dielectric materials. Corresponding simulations of ultrashort pulse propagation through the material are frequently used to gain additional insight into the processes leading to such damage. However, comparison between such experimental and numerical results is often qualitative, and pulses near to but not exceeding the damage threshold leave no permanent changes in the material for postmortem analysis. In this article, a series of experiments is presented that measures the near-and far-field properties of a 140-fs laser pulse after propagation through a fused silica sample in which a noncritical electron plasma was generated. Concurrently, results from simulations in which the laser pulse was numerically constructed according to the nearfield beam profile and frequency resolved optical gating (FROG) trace are presented. It is found that to extract a quantitative comparison of such data, cylindrical symmetry of the laser pulse in simulations should be abandoned in favor of a fully 3 + 1D Cartesian representation. Further comparison of experimental and calculated damage thresholds shows that time-corrective effects predicted by the Drude model play a critical role in the physics of both pulse evolution and plasma formation. The influence of resulting spatiotemporal dependences of the pulse in far-field measurements leads to unretrievable FROG traces. However, it is shown through both simulation and experiment that the use of an appropriate beam aperture will eliminate this effect when measuring the temporal pulse amplitude.

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“…It is found that SiO 2 nanoparticles dispersed in liquid polymethylsiloxane exhibit unique optical nonlinearity in low-intensely visible radiation fields [9]. Transient response of dielectric materials under ultrafast laser radiation is studied and a dynamical observation on the development of electron-hole plasmas is presented [10]. Researches have demonstrated that the dielectric constant of ferroelectric materials changes nonlinearly along with the changes of external electric field, which is the characteristic of ferroelectric materials themselves [11,20].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear behavior of microwave semiconductor materials measured under a strong electromagnetic environment using a compressed rectangular resonant cavity

Gao

Zhang

et al. 2017

Appl. Phys. A

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The dielectric property of microwave semiconductor materials is investigated under a strong electromagnetic field environment through a compressed rectangular cavity around the frequency of 2.45G. It is demonstrated that the dielectric property of indium phosphate (InP), a kind of microwave semiconductor material, changes when a larger power is injected into the designed cavity. The injected power changes the strength of the electric field in the cavity. Measurement results show that InP has an obvious nonlinear dielectric property when a strong electromagnetic field acts on the material. According to effective experimental method and theoretical analysis, we conclude that the nonlinear behavior is not caused by microwave heating, but caused by the material's inherent nonlinearity.

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Transient response of dielectric materials exposed to ultrafast laser radiation

Cited by 67 publications

References 65 publications

Time-dependent density functional theory for strong electromagnetic fields in crystalline solids

Time-dependent density functional theory for strong electromagnetic fields in crystalline solids

Interaction of ultrashort-laser pulses with induced undercritical plasmas in fused silica

Nonlinear behavior of microwave semiconductor materials measured under a strong electromagnetic environment using a compressed rectangular resonant cavity

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