Femtosecond laser pulse induced breakdown in dielectric thin films

Jasapara, J.; Nampoothiri, A. V. V.; Rudolph, Wolfgang; Ristau, Detlev; Starke, K.

doi:10.1103/physrevb.63.045117

Cited by 145 publications

(92 citation statements)

References 12 publications

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“…Using sequences of multiple pulses have been shown to be relevant in this purpose, in the case of LIBS [11], laser ablation in solids [12,13] or dielectrics [14], and filamentation.…”

Section: Introductionmentioning

confidence: 99%

Optimal laser-pulse energy partitioning for air ionization

et al. 2016

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We investigate the pulse partitioning of a 6.3-mJ, 450-fs pulse at 1030 nm to produce plasma channels. At such moderate energies, splitting the energy into several subpulses reduces the ionization efficiency and thus does not extend the plasma lifetime. We numerically show that when sufficient energy to produce multifilamentation is available, splitting the pulse temporally in a pulse train increases the gas temperature compared to a filament bundle of the same energy. This could improve the mean free path of the free electrons, therefore enhancing the efficiency of discharge triggering.

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“…Using sequences of multiple pulses have been shown to be relevant in this purpose, in the case of LIBS [11], laser ablation in solids [12,13] or dielectrics [14], and filamentation.…”

Section: Introductionmentioning

confidence: 99%

Optimal laser-pulse energy partitioning for air ionization

et al. 2016

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“…To estimate the relative contribution of Landau damping to absorption we consider a thin dielectric film irradiated by an infrared or optical femtosecond laser with intensity ∼ 10 14 W/cm 2 . Laser pulses with such parameters are widely using in studies of the optical breakdown in dielectrics (see [6] and references therein). The laser field produces inner ionization from the valence to the conduction band, where electrons behave as a classical plasma with temperature close to the ponderomotive energy in the field (9).…”

Section: Discussionmentioning

confidence: 99%

“…(20) with the field (9) has the solution 6) where the subscript "+" indicates that the trajectory is calculated for an electron that starts its motion at the left side of the well at t = 0 (i.e. where the parameter x is the same as in (B.2).…”

Section: Appendix B2 Diffuse Scatteringmentioning

confidence: 99%

Landau damping in thin films irradiated by a strong laser field

Zaretsky

Korneev

Popruzhenko

et al. 2004

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. The rate of linear collisionless damping (Landau damping) in a classical electron gas confined to a heated ionized thin film is calculated. The general expression for the imaginary part of the dielectric tensor in terms of the parameters of the single-particle self-consistent electron potential is obtained. For the case of a deep rectangular well, it is explicitly calculated as a function of the electron temperature in the two limiting cases of specular and diffuse reflection of the electrons from the boundary of the self-consistent potential. For realistic experimental parameters, the contribution of Landau damping to the heating of the electron subsystem is estimated. It is shown that for films with a thickness below about 100 nm and for moderate laser intensities it may be comparable with or even dominate over electron-ion collisions and inner ionization.

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“…5 Rare-earth doped Ta 2 O 5 waveguide films have the potential to provide compact sources and amplifiers for a wide range of applications in telecommunications and elsewhere. High index materials offer advantages for making compact waveguides with small effective area, enabling low-threshold lasing and the exploitation of nonlinear effects at low power.…”

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confidence: 99%

Nd : Ta 2 O 5 rib waveguide lasers

Ünal

Tai

Shepherd

et al. 2005

Applied Physics Letters

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Ta 2 O 5 waveguides offer great potential for high-density active photonic crystal circuits and their combination with rare-earth dopants for active devices is of interest for increasing their potential functionality. To this end, neodymium-doped Ta 2 O 5 rib waveguide lasers have been fabricated on an oxidized silicon wafer by RF sputtering and argon ion-beam milling and the first laser action in this material has been demonstrated. Lasing was observed at wavelengths between 1060nm and 1080nm and an absorbed pump power threshold of 87mW was obtained.

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Femtosecond laser pulse induced breakdown in dielectric thin films

Cited by 145 publications

References 12 publications

Optimal laser-pulse energy partitioning for air ionization

Optimal laser-pulse energy partitioning for air ionization

Landau damping in thin films irradiated by a strong laser field

Nd : Ta 2 O 5 rib waveguide lasers

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