Journal ArticleDOI
On the role of surface plasmon polaritons in the formation of laser-induced periodic surface structures upon irradiation of silicon by femtosecond-laser pulses
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In this paper, the formation of nearly wavelength-sized laser-induced periodic surface structures (LIPSSss) on single-crystalline silicon upon irradiation with single or multiple femtosecond-laser pulses (pulse duration τ=130Abstract:
The formation of nearly wavelength-sized laser-induced periodic surface structures (LIPSSs) on single-crystalline silicon upon irradiation with single or multiple femtosecond-laser pulses (pulse duration τ=130 fs and central wavelength λ=800 nm) in air is studied experimentally and theoretically. In our theoretical approach, we model the LIPSS formation by combining the generally accepted first-principles theory of Sipe and co-workers with a Drude model in order to account for transient intrapulse changes in the optical properties of the material due to the excitation of a dense electron-hole plasma. Our results are capable to explain quantitatively the spatial periods of the LIPSSs being somewhat smaller than the laser wavelength, their orientation perpendicular to the laser beam polarization, and their characteristic fluence dependence. Moreover, evidence is presented that surface plasmon polaritons play a dominant role during the initial stage of near-wavelength-sized periodic surface structures in fem...read more
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Journal ArticleDOI
Refining femtosecond laser induced periodical surface structures with liquid assist
TL;DR: In this paper, a femtosecond laser was used to generate periodic surface structures on silicon wafer using air and ethanol medium, which showed a 30% increase in spatial wavelength compared to ethanol.
Journal ArticleDOI
Progressive evolution of silicon surface microstructures via femtosecond laser irradiation in ambient air
TL;DR: Using 800-nm femtosecond laser irradiation, progressive evolution of the silicon surface microstructures has been demonstrated in this article using a scanning electronic microscopy equipped with an energy dispersive x-ray spectroscopy.
Journal ArticleDOI
Picosecond laser texturing on titanium alloy for biomedical implants in cell proliferation and vascularization
TL;DR: Cell culture experiments and animal studies showed that titanium alloy implants with 30- and 60-μm-deep groove arrays on the surface-enhanced cell proliferation and adhesion promoted the growth of new blood vessels and enhanced the combination of blood vessel and implants in vivo.
Journal ArticleDOI
Influence of surface plasmon polaritons on laser energy absorption and structuring of surfaces
P.N. Terekhin,P.N. Terekhin,O. Benhayoun,Sebastian T. Weber,D. S. Ivanov,D. S. Ivanov,D. S. Ivanov,Martin E. Garcia,Baerbel Rethfeld +8 more
TL;DR: In this paper, the authors proposed the analytical form of the source term, which takes into account surface plasmon polaritons (SPP) excited at a step edge of a dielectric-metal interface upon irradiation of an ultrashort laser pulse at normal incidence.
Journal ArticleDOI
Laser-induced spalling of thin metal film from silica substrate followed by inflation of microbump
TL;DR: In this article, the authors studied the dynamics of a thin gold film on a silica substrate triggered by fast heating with the use of a sub-picosecond laser pulse and found that the pressure waves generated by such heating may result in spalling (delamination) of the film and its flying away from the substrate after an acoustic time defined by the film thickness and speed of sound.
References
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Laser-induced periodic surface structure. I. Theory
TL;DR: In this paper, a theory for laser-induced periodic surface structure was developed by associating each Fourier component of induced structure with the corresponding Fourier components of inhomogeneous energy deposition just beneath the surface.
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Femtosecond laser ablation of silicon–modification thresholds and morphology
TL;DR: In this article, the initial modification and ablation of crystalline silicon with single and multiple Ti:sapphire laser pulses of 5 to 400 fs duration was investigated, and the authors found the phenomena amorphization, melting, re-crystallization, nucleated vaporization, and Ablation to occur with increasing laser fluence down to the shortest pulse durations.
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Generation of dense electron-hole plasmas in silicon
TL;DR: In this paper, the authors studied the generation of dense electron-hole plasmas in silicon with intense 100-fs laser pulses by time-resolved measurements of the optical reflectivity at 625 nm.