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
Pyramid-like spikes in a single crystal superalloy produced by picosecond laser irradiation
TL;DR: In this paper, pyramid-like spikes in a single crystal superalloy were investigated upon irradiation with picosecond (ps) laser pulses under different laser fluences and pulse numbers.
Journal ArticleDOI
In situ probing of pulsed laser melting and laser-induced periodic surface structures formation by dynamic reflectivity
T T D Huynh,N Semmar +1 more
Light trapping by light treatment : direct laser interference patterning for the texturing of front contacts in thin-film silicon solar cells
TL;DR: In this paper, an industrial feasible laser-based process for the texturing of the zinc oxide (ZnO:Al) layer used as front contact in solar cells is presented.
Journal ArticleDOI
Enhancing SERS detection on a biocompatible metallic substrate for diabetes diagnosing
TL;DR: A surface-enhanced Raman spectroscopy (SERS) at a titanium alloy substrate for glucose detection has been experimentally demonstrated in this paper, where a silver-coated laser-induced periodic surface structure (LIPSS) was prepared via femtosecond laser micro-processing.
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: In this article, the performance of representative statistical and machine learning algorithms in predicting the outcome of laser processing on a range of materials was investigated, and the 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.
References
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Book
Handbook of Optical Constants of Solids
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.
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.