Experimental and theoretical study of absorption of femtosecond laser pulses in interaction with solid copper targets

Kirkwood, Sean E.; Tsui, Ying Y.; Fedosejevs, R.; Brantov, A. V.; Bychenkov, V. Yu.

doi:10.1103/physrevb.79.144120

Cited by 63 publications

(31 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A simple semianalytical model of femtosecond electron heating and resultant optical absorption is developed to describe the time dependence and integral reflectivity covering the range from cold metal response to the hot plasma response. The model is in good agreement with experimental ultrafast reflectivity measurements over the intensity range studied [11].…”

Section: Introductionsupporting

confidence: 81%

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO<sub>3</sub>

Saxena¹,

Dixit²,

Srivastava³

2016

JMP

View full text Add to dashboard Cite

This paper deals with the interaction of femtosecond laser with strain dependent high dielectric material. For this investigation, ferroelectric material like BaTiO 3 has been chosen because of centrosymmetric structure. Due to irradiation of laser light, the micro-structure of BaTiO 3 is found to change along the direction of heat propagation. SEM and AFM tools have been used to detect the morphology and roughness of the femotosecond laser treated BaTiO 3 . The change of morphology and surface behavior depends upon the laser fluence and intensity of laser light. The maximum change in morphology has been observed at a higher laser fluence.

show abstract

Section: Introductionsupporting

confidence: 81%

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO<sub>3</sub>

Saxena¹,

Dixit²,

Srivastava³

2016

JMP

View full text Add to dashboard Cite

show abstract

“…Similar studies have been conducted on various materials (Sokolowski-Tinten et al, 1995;Vonderlinde et al, 1997;Hohlfeld et al, 2000;Bonse et al, 2002;Komashko, 2003;Coyne et al, 2004;Fisher et al, 2005;Lin et al, 2008;Kirkwood et al, 2009;Byskov-Nielsen et al, 2010;Derrien et al, 2010), though most of these studies were focused exclusively on either the theoretical or experimental aspects of the ablation. Similar studies have been conducted on various materials (Sokolowski-Tinten et al, 1995;Vonderlinde et al, 1997;Hohlfeld et al, 2000;Bonse et al, 2002;Komashko, 2003;Coyne et al, 2004;Fisher et al, 2005;Lin et al, 2008;Kirkwood et al, 2009;Byskov-Nielsen et al, 2010;Derrien et al, 2010), though most of these studies were focused exclusively on either the theoretical or experimental aspects of the ablation.…”

Section: Introductionmentioning

confidence: 76%

Dependence of silicon ablation regimes on fluence during ultrafast laser irradiation

Polek

Hassanein

2016

Laser Part. Beams

View full text Add to dashboard Cite

Models and experiments were developed to study femtosecond laser ablation of silicon using 800 nm, 40 fs pulses with fluences ranging from 0.5 to 35 J/cm 2 . At low fluences, ablation was found to occur due to bubble formation and splashing within the melt layer. At higher fluences, it was found that the ablation depth exceeded the melt layer depth due to shockwave ablation. The variation in ion flux and ion velocity was also studied both experimentally and theoretically. It was found that the variation in ion flux is mainly dependent on the variation in the average charge state, with only a small variation in the total number of ions above ∼1.5 J/cm 2 . Comparisons between the theoretical and experimental ion flux showed that higher charge state ions received greater portion of the laser energy compared with lower charge state ions.

show abstract

“…The first one considers the constant reflectivity, R = 0.974 [26], of a flat, ideally polished gold sample irradiated in vacuum by 100-fs, 800-nm laser pulse at normal incidence. The second set of modelling includes the Drude model for optical properties of gold to calculate the reflection and absorption coefficients as a function of the lattice and electron temperatures [33]. The real and imaginary parts of the dielectric function can respectively be expressed as ε ′ = 1 − ω 2 pe / (ω 2 + ν 2 eff ) and ε ′′ = ν eff ω 2 pe / (ω (ω 2 + ν 2 eff )) with ω pe the plasma frequency, ω = 2πc/λ las , and ν eff = min (ν e ; ν c ).…”

Section: Discussionmentioning

confidence: 99%

Role of the temperature dynamics in formation of nanopatterns upon single femtosecond laser pulses on gold

et al. 2017

View full text Add to dashboard Cite

In this paper we investigate whether the periodic structures on metal surfaces exposed to single ultrashort laser pulses can appear due to an instability induced by two-temperature heating dynamics. The results of two-temperature model (TTM) 2D simulations are presented on the irradiation of gold by a single 800 nm femtosecond laser pulse whose intensity is modulated in order to reproduce a small initial temperature perturbation, which can arise from incoming and scattered surface wave interference. The growing (unstable) modes of the temperature distribution along the surface may be responsible for the LIPSS (Laser Induced Periodic Surface Structures) formation.After the end of the laser pulse and before the complete coupling between lattice and electrons occurs, the evolution of the amplitude of the subsequent modulation in the lattice temperature reveals different tendencies depending on the spatial period of the initial modulation.This instability-like behaviour is shown to arise due to the perturbation of the electronic temperature which relaxes slower for bigger spatial periods and thus imparts more significant modulations to the lattice temperature. Small spatial periods of the order of 100 nm and smaller experience stabilization and fast decay from the more efficient lateral heat diffusion which facilitates the relaxation of the electronic temperature amplitude due to in-depth diffusion. An analytical instability analysis of a simplified version of the TTM set of equations supports the lattice temperature modulation behaviour obtained in the simulations and reveals that in-depth diffusion length is a determining parameter in the dispersion relation of unstable modes. Finally it is discussed how the change in optical properties can intensify the modulation-related effects.PACS numbers:

show abstract

Experimental and theoretical study of absorption of femtosecond laser pulses in interaction with solid copper targets

Cited by 63 publications

References 25 publications

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO<sub>3</sub>

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO<sub>3</sub>

Dependence of silicon ablation regimes on fluence during ultrafast laser irradiation

Role of the temperature dynamics in formation of nanopatterns upon single femtosecond laser pulses on gold

Contact Info

Product

Resources

About

Experimental and theoretical study of absorption of femtosecond laser pulses in interaction with solid copper targets

Cited by 63 publications

References 25 publications

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO&lt;sub&gt;3&lt;/sub&gt;

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO&lt;sub&gt;3&lt;/sub&gt;

Dependence of silicon ablation regimes on fluence during ultrafast laser irradiation

Role of the temperature dynamics in formation of nanopatterns upon single femtosecond laser pulses on gold

Contact Info

Product

Resources

About

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO<sub>3</sub>

An Experimental Study of Microstructure through SEM and AFM by Interaction from High Power Femtosecond Laser Wave with BaTiO<sub>3</sub>