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
Experimental study of fs-laser induced sub-100-nm periodic surface structures on titanium
Chandra S.R. Nathala,Ali Ajami,Andrey A. Ionin,Sergey I. Kudryashov,Sergey V. Makarov,Thomas Ganz,Andreas Assion,Wolfgang Husinsky +7 more
TL;DR: The HSFL formation mechanism cannot be described by the widely accepted interference model developed for describing LSFL formation, and it was observed that these two types of LIPSS demonstrate different fluence, shot number and wavelength dependencies, which suggest their origin is different.
Journal ArticleDOI
Assessment of femtosecond laser induced periodic surface structures on polymer films.
Esther Rebollar,Javier R. Vázquez de Aldana,Ignacio Martín-Fabiani,Margarita Hernández,Daniel R. Rueda,Tiberio A. Ezquerra,Concepción Domingo,Pablo Moreno,Marta Castillejo +8 more
TL;DR: Comparison of experimental and simulated GISAXS patterns suggests that LIPSS can be suitably described considering a quasi-one-dimensional paracrystalline lattice and that irradiation parameters have an influence on the order of such a lattice.
Journal ArticleDOI
Periodical structures induced by femtosecond laser on metals in air and liquid environments
TL;DR: In this paper, the laser-induced periodic surface structures (LIPSS) are obtained on metallic films (Cr, Ti, and W) by femtosecond laser pulses working at both fundamental (775 nm) and frequency doubled (387 nm) wavelengths in air and liquid environments.
Journal ArticleDOI
Modeling laser-induced periodic surface structures: Finite-difference time-domain feedback simulations
TL;DR: In this article, a model predicting the formation of laser-induced periodic surface structures (LIPSSss) is presented, where the rough surface is modified by "ablation after each laser pulse, according to the absorbed energy profile, in order to account for inter-pulse feedback mechanisms".
Journal ArticleDOI
Generation of high spatial frequency ripples on silicon under ultrashort laser pulses irradiation
TL;DR: In this paper, a refined model of the second harmonic generation ripples spacing theory was proposed, taking into account the modified femtosecond laser excited silicon refractive index n∗ related to the Drude model.
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.
Journal ArticleDOI
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.