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
TLDR
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
Citations
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Journal ArticleDOI
Predictive modeling approaches in laser-based material processing
Maria Christina Velli,Maria Christina Velli,George D. Tsibidis,Alexandros Mimidis,Alexandros Mimidis,Evangelos Skoulas,Evangelos Skoulas,Yannis Pantazis,Emmanuel Stratakis,Emmanuel Stratakis +9 more
TL;DR: Results on experimental data showed that predictive models were able to satisfactorily learn the mapping between the laser input variables and the observed material structure, and a metric to identify and quantify the regions with high predictive uncertainty is presented, revealing that high uncertainty occurs around the transition boundaries.
Journal ArticleDOI
Periodic and uniform nanogratings formed on cemented carbide by femtosecond laser scanning
TL;DR: In this article, three experiments were designed to study the influence of single pulse energy, scanning speed, and scanning spacing on the period and uniformity of the formed nanogratings.
Journal ArticleDOI
Picosecond Laser-Induced Hierarchical Periodic Near- and Deep-Subwavelength Ripples on Stainless-Steel Surfaces.
TL;DR: A qualitative explanation based on the surface plasmon polariton modulated periodic coulomb explosion is proposed for unified interpretation of the formation mechanism of hierarchical periodic NSRs and DSRs, which includes lattice orientation of grains as a factor at low peak power density.
Journal ArticleDOI
Controlled periodicities of ladder-like structures via femtosecond laser of wavelength from 400 nm to 2200 nm
TL;DR: In this article, a femtosecond laser-induced periodic surface structures (LIPSS) combined with high spatial frequency LIPSS (HSFL) are fabricated simultaneously on a stainless-steel surface.
Journal ArticleDOI
Picosecond laser fabrication of nanostructures on ITO film surface assisted by pre-deposited Au film
TL;DR: In this article, an approach to obtain optimized periodic surface structures (LIPSSs) by sputtering an Au thin film on the ITO film surface was proposed, where the upper layer of thin Au film can cause surface energy aggregation, inducing the initial ripple structures.
References
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Book
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TL;DR: In this paper, E.D. Palik and R.R. Potter, Basic Parameters for Measuring Optical Properties, and W.W.Hunter, Measurement of Optical Constants in the Vacuum Ultraviolet Spectral Region.
Journal ArticleDOI
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.
Journal ArticleDOI
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.