Laser fluence dependence of periodic grating structures formed on metal surfaces under femtosecond laser pulse irradiation

Okamuro, Kiminori; Hashida, Masaki; Miyasaka, Yasuhiro; Ikuta, Yasushi; Tokita, Shigeki; Shimizu, Shuji

doi:10.1103/physrevb.82.165417

Cited by 195 publications

(130 citation statements)

References 33 publications

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“…The dependency of LIPSS formation on fluence was also studied for Mo, Ti and Pt. For all cases, the periodicity increased with increasing fluence [104]. In contrast, the effect of fluence on LIPSS spacing at normal incidence was not detected on SS304 by Groenendijik et al [71].…”

Section: Periodic Nanostructuresmentioning

confidence: 69%

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Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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Abstract:Femtosecond laser micromachining has emerged in recent years as a new technique for micro/nano structure fabrication because of its applicability to virtually all kinds of materials in an easy one-step process that is scalable. In the past, much research on femtosecond laser micromachining was carried out to understand the complex ablation mechanism, whereas recent works are mostly concerned with the fabrication of surface structures because of their numerous possible applications. The state-of-the-art knowledge on the fabrication of these structures on metals with direct femtosecond laser micromachining is reviewed in this article. The effect of various parameters, such as fluence, number of pulses, laser beam polarization, wavelength, incident angle, scan velocity, number of scans, and environment, on the formation of different structures is discussed in detail wherever possible. Furthermore, a guideline for surface structures optimization is provided. The authors' experimental work on laser-inscribed regular pattern fabrication is presented to give a complete picture of micromachining processes. Finally, possible applications of laser-machined surface structures in different fields are briefly reviewed.

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Section: Periodic Nanostructuresmentioning

confidence: 69%

“…It is interesting to note that among all metals and alloys most research on LSFL formation was conducted on Ti. Furthermore, with the same 800 nm laser wavelength LSFL with periodicity ranging from 500 to 700 nm were produced [29,84,104,111]. Table 3.…”

Section: Periodic Nanostructuresmentioning

confidence: 99%

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

2014

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“…In this Letter, "transient permittivity" is used to present the transient variation of optical properties of Ni. The surface electron density affected the interface permittivity between the surface and the environment [9][10][11] . When the electron density depends on laser fluence, the permittivity in turn depends on laser fluence.…”

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confidence: 99%

“…There is no confinement from the diffraction ring, and the ripple widths agree well with the results reported in Refs. [9][10][11][12].…”

mentioning

confidence: 99%

“…The classical scattering model, which was used to explain the LIPSSs formation irradiated by long duration laser pulses, was too simple to explain the formation of a fs laserinduced LSFL. In order to explain the formation mechanism, several explanations have been proposed, such as the interference between the laser field and surface plasmon polaritons (SPPs), interference between laser and scattered light, self-organization, and coulomb explosion [8][9][10][11][12][13][14][15][16][17] . However, it is still difficult to evaluate which mechanism contributes mainly to the LSFL formation under the irradiation of fs laser pulses.…”

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confidence: 99%

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Periodic surface structures on Ni–Fe film induced by a single femtosecond laser pulse with diffraction rings

et al. 2017

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This Letter reports the formation of periodic surface structures on Ni-Fe film irradiated by a single femtosecond laser pulse. A concave lens with a focus length of −150 mm is placed in front of an objective (100×, NA ¼ 0.9), which transforms the Gaussian laser field into a ring distribution by the Fresnel diffraction. Periodic ripples form on the ablation area after the irradiation of a single femtosecond laser pulse, which depends on the laser polarization and laser fluence. We propose that the ring structure of the laser field leads to a similar transient distribution of the permittivity on the sample surface, which further launches the surface plasmon polaritons. The interaction of the incident laser with surface plasmon polaritons dominates the formation of periodic surface structures.OCIS codes: 220.4241, 160.3900, 240.6700, 320.7090. doi: 10.3788/COL201715.022201.Laser-induced periodic surface structures (LIPSSs) have been studied intensely in the last five decades [1][2][3][4][5][6][7][8] . Initial reports on the formation of LIPSSs were usually irradiated by a continuous wave (CW) or long duration laser pulses [nanosecond (ns) laser]. The periods of these structures (are usually ripples) were approximately equal to the laser wavelength. These periodic ripples were attributed to the interference between the incident laser and the scattered light caused by surface defects [1][2][3][4] . Low spatial frequent LIPSSs (LSFL) have been observed in semiconductors, dielectrics, and metals after the irradiation of femtosecond (fs) laser pulses . Laser polarization, fluence, and the number of laser pulses have been identified as the key parameters for the LSFL formation. Experimental results indicated that the dynamics of a fs laser-induced LSFL were rather different from the near-wavelength ripples induced by a CW and a ns laser. For a normal incident laser with a wavelength λ, the ripple periods changed in the range of 0.5λ-0.95λ [15]

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Nanomaterials: Laser‐Induced Nano/Microfabrications

et al. 2012

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Laser fluence dependence of periodic grating structures formed on metal surfaces under femtosecond laser pulse irradiation

Cited by 195 publications

References 33 publications

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Fabrication of Micro/Nano Structures on Metals by Femtosecond Laser Micromachining

Periodic surface structures on Ni–Fe film induced by a single femtosecond laser pulse with diffraction rings

Nanomaterials: Laser‐Induced Nano/Microfabrications

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