Surface ablation of congruent and Mg-doped lithium niobate by femtosecond laser

Lao, Huiying; Zhu, Hai; Chen, X.

doi:10.1134/s1054660x1001010x

Cited by 9 publications

(5 citation statements)

References 21 publications

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“…It is therefore reasonable to conclude that the incubation is influenced not only by the number of pulses that impinged on the sample surface but also on the laser-irradiating approaches. The incubation factor obtained in our work for Nd:YAG crystal is much smaller than the previously reported values for, such as, sapphire crystals [6,29], lithium niobate crystal [14] and glass [11,13]. Nonetheless, it would be expected though, that the incubation factor is low but very important for the ablation of Nd:YAG crystal.…”

Section: Micro-structures Produced In Dynamic Scanning Casecontrasting

confidence: 77%

“…Through ultrafast laser irradiation, the local intensity distribution can be engineered via tailoring the irradiation parameters, achieving various kinds of modifications on different materials. Micrometer-sized structures in dielectric materials produced by laser irradiation, such as micro-craters or micro-channels, have been investigated experimentally and theoretically [4][5][6][7][8][9][10][11][12][13][14]. Upon ablation of these materials with laser pulses, usually two cases are performed which are ''stationary focusing case" with the beam focused on the target surface in the steady focusing geometry and ''scanning case" with focused fs-laser beam scanning over the target material.…”

Section: Introductionmentioning

confidence: 99%

“…Upon ablation of these materials with laser pulses, usually two cases are performed which are ''stationary focusing case" with the beam focused on the target surface in the steady focusing geometry and ''scanning case" with focused fs-laser beam scanning over the target material. It has been revealed that, during multiple laser pulse micromachining, the incubation effect, which is related to the laser induced defects, influence the ablation threshold and thereby is partly responsible for the formation of micro-structures [6,[11][12][13][14]. For both practical and theoretical reasons, it is crucial to determine the laser-induced damage threshold of certain material.…”

Section: Introductionmentioning

confidence: 99%

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Femtosecond laser irradiation on Nd:YAG crystal: Surface ablation and high-spatial-frequency nanograting

Ren

Zhang

Romero

et al. 2018

Applied Surface Science

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In this work, we systematically study the surface modifications of femtosecond (fs) laser irradiated Nd: YAG crystal in stationary focusing case (i.e., the beam focused on the target in the steady focusing geometry) or dynamic scanning case (i.e., focused fs-laser beam scanning over the target material). Micro-sized structures (e.g. micro-craters or lines) are experimentally produced in a large scale of parameters in terms of pulse energy as well as (effective) pulse number. Surface ablation of Nd:YAG surface under both processing cases are investigated, involving the morphological evolution, parameter dependence, the ablation threshold fluences and the incubation factors. Meanwhile, under specific irradiation conditions, periodic surface structures with high-spatial-frequency (

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Section: Micro-structures Produced In Dynamic Scanning Casecontrasting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Femtosecond laser irradiation on Nd:YAG crystal: Surface ablation and high-spatial-frequency nanograting

Ren

Zhang

Romero

et al. 2018

Applied Surface Science

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“…Although the fabrication of 3D NPCs is extremely difficult, many experimental explorations have been done. The most possible realization of the 3D NPC now seems to be the domain reversal induced by ultraviolet pulses [20,21] and femtosecond laser [22][23][24] due to the relatively convenient operation of light which avoids the complicated scheme including multiple steps such as bonding, cutting, and regrowth. Once the fabrication of the 3D NPC comes true, a great deal of work may be concentrated on this newly arisen research direction.…”

Section: Introductionmentioning

confidence: 99%

Generation of conical and spherical second harmonics in three-dimensional nonlinear photonic crystals with radial symmetry

Chen

2011

J. Opt. Soc. Am. B

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Two types of radially symmetric three-dimensional nonlinear photonic crystals with the cylindrical structure and the egglike structure are proposed, from which the conical and the spherical quadratic harmonic waves can be produced, respectively, by three-dimensional quasi-phase matching. First, the cylindrical structures with periodic and aperiodic modulations of the nonlinear coefficient are both studied, showing their significant advantages compared to the corresponding two-dimensional structures. The dependencies of the transverse and the longitudinal phase-matching periods on harmonic propagating directions are also calculated and analyzed. Then, the egglike structure is designed by programming and the distribution of reciprocal vectors is presented, indicating its ability to generate the spherical harmonic as a point light source. The investigation of the intensity distribution on the spherical wavefront is also performed, showing its strong dependence on the harmonic polarization and the quadratic nonlinear coefficients.

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“…The use of ultrafast laser pulses is having an impact on materials and processing in biological tissues in a profound ways [1][2][3][4][5][6][7]. Laser precision engineering is being extensively applied in industries for device micro fabrication due to its unique advantages of being a dry and noncontact process, coupled with the availability of reliable light sources and affordable system cost [8,9].…”

Section: Introductionmentioning

confidence: 99%

Time progression of ultrashort laser ablation in a transparent material

et al. 2011

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Abstract-Laser ablation on the ultra short pulses regime (femtosecond), has an impact on materials pro cessing and micromachining in a quite profound ways. The investigation of the time progression of the laser ablation process within the material can produce much information and it is not conventionally used. The implementation of such study is the main aim of this paper. The temporal dependence of the diameter and depth of micro drilling in the sample was verified, beyond the simple understanding of the mechanism for plasma generated during the ablation. From the monitoring of the time progression of the ablation, the time dependence for the velocity of ablation had been determined. In most cases, fume attenuation of the incom ing laser beam and fume escape paths, produce dominant influence the characteristics of the region ablated. The method here employed is simple and can be carried out in real time without interruption of the process. In the implemented method light scattered from an auxiliary source allow visualization and record of the ablated geometry as it progress.

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Surface ablation of congruent and Mg-doped lithium niobate by femtosecond laser

Cited by 9 publications

References 21 publications

Femtosecond laser irradiation on Nd:YAG crystal: Surface ablation and high-spatial-frequency nanograting

Femtosecond laser irradiation on Nd:YAG crystal: Surface ablation and high-spatial-frequency nanograting

Generation of conical and spherical second harmonics in three-dimensional nonlinear photonic crystals with radial symmetry

Time progression of ultrashort laser ablation in a transparent material

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