Grating-like nanostructures formed by the focused fs laser pulse in the volume of transparent dielectric

Gildenburg, V. B.; Pavlichenko, I. A.

doi:10.1364/ol.44.002534

Cited by 7 publications

(6 citation statements)

References 32 publications

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“…The formation of quasi‐periodic nanoplasmas with periodicities λ/2 n , where λ is the laser wavelength and n is the refractive index of the material, starting from initial inhomogeneous refractive index distributions (related to rough interface, [ 6,7 ] presence of intrinsic voids or defects, [ 4,5 ] or refractive index perturbations [ 37 ] ) was reported in several works. Independently on the nature of the initial perturbations, the interference of the incident and the inhomogeneity‐scattered waves prioritizes the arrangement with periods being a fraction of the propagating laser wavelength in medium.…”

Section: Resultsmentioning

confidence: 99%

Genesis of Nanogratings in Silica Bulk via Multipulse Interplay of Ultrafast Photo‐Excitation and Hydrodynamics

Rudenko

Colombier

Itina

et al. 2021

Advanced Optical Materials

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Structuring below diffraction limit is key to developing new laser processing technologies as well as to understanding light-induced processes on mesoscopic scales, notably self-organization. Here, an advanced numerical perspective on the generation of embedded self-arranged sub-wavelength periodic patterns is developed, describing multipulse ultrafast laser interaction with bulk silica glass. Combining light and material dynamics, the approach couples self-consistently nonlinear propagation, electronic excitation, and fluid dynamics resulting in irreversible phase transitions and localized damage. With increasing the number of applied pulses, the modification changes from localized nanovoids and elongated random nanopatterns towards regular void nanogratings dominantly covering the spot of the focused laser beam. Driven by local and collective scattering events, the order imposed by electric field patterns is then amplified and stabilized by the material response. The model predicts the gradual evolution of the optical properties considering the complex interplay between material arrangement and the electromagnetic field distribution. It allows thus to define light transport optical functions optimizing losses and anisotropic effects.

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Section: Resultsmentioning

confidence: 99%

Genesis of Nanogratings in Silica Bulk via Multipulse Interplay of Ultrafast Photo‐Excitation and Hydrodynamics

Rudenko

Colombier

Itina

et al. 2021

Advanced Optical Materials

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“…The released harmonic relatively quickly leads to a strong corrugation of the breakdown wave front with a period equal to plasmon wave length; due to the strong modulation of the field amplitude (and hence the ionization rate) along the front, the discharge decays into separate layers with suprathreshold density ( Figure 6 and Figure 7 ). At the final stage of the process, these layers (in fact the same as in the case of an initially purely harmonic perturbation with a given period [ 18 , 27 ]) lead to the formation of a contrast grating structure characterized by a strong nonuniformity in the transverse direction distribution of the energy deposition density ( Figure 8 ). Within the parameter range used in calculations, the spatial period of this structure

turned out to be close to

nm, which fits into the framework determined by the experimental data.…”

Section: Results Of Calculationmentioning

confidence: 99%

“…The main tasks in this approaches are: (i) description of the joint evolution of the electric field and plasma density perturbations against the background of some quasi-stationary equilibrium states, (ii) obtaining dispersion equations connecting the growth rate constants (so called increments of instabilities) of these perturbations with characteristics of their spatial structure (spatial periods or wave numbers), and (iii) finding the optimal conditions providing enough fast growth of unstable perturbations in a definite range of the wave numbers at the linear and nonlinear stages of instability (corresponding to small and large perturbations, respectively). As applied to the above nanograting problem this program was realized within the framework of simple quasi-one-dimensional models of optical discharge maintained in fused silica (in the absence [17,18] or presence [19] of easily ionizable small inclusions) by traveling plane wave. These models have given results agreeing with experiments in respect of both grating orientation and observed period range of most quickly growing spatial modulation.…”

Section: Introductionmentioning

confidence: 99%

Internal Surface Plasmon Excitation as the Root Cause of Laser-Induced Periodic Plasma Structure and Self-Organized Nanograting Formation in the Volume of Transparent Dielectric

Gildenburg

Pavlichenko

2020

Nanomaterials

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A computer simulation of the dynamics of an optical discharge produced in the volume of a transparent dielectric (fused silica) by a focused femtosecond laser pulse was carried out taking into account the possibility of developing small-scale ionization-field instability. The presence of small foreign inclusions in the fused silica was taken into account with the model of a nanodispersed heterogeneous medium by using Maxwell Garnett formulas. The results of the calculations made it possible to reveal the previously unknown physical mechanism that determines the periodicity of the ordered plasma-field structure that is formed in each single breakdown pulse and is the root cause of the ordered volume nanograting formation in dielectric material exposed to a series of repeated pulses. Two main points are decisive in this mechanism: (i) the formation of a thin overcritical plasma layer at the breakdown wave front counter-propagated to the incident laser pulse and (ii) the excitation of the “internal surface plasmon” at this front, resulting in a rapid amplification of the corresponding spatial harmonic of random seed perturbations in the plasma and formation of a contrast structure with a period equal to the wavelength of the surface plasmon (0.7 of the wavelength in dielectric).

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“…Such a unique form of matter as periodic plasma [27] can be created, for example, by the high-power laser interaction with the periodically ordered dielectric material. Recently, the properties of periodic plasma have been studied theoretically [28,29] and experimentally [30][31][32][33]. One of the fascinating properties of laser-produced periodic plasma is the enhancement of the generated intensity in the cases of low order harmonic generation in comparison to a uniform plasma [34].…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser produced periodic plasma in a colloidal crystal probed by XFEL radiation

Mukharamova,

Lazarev,

Meijer

et al. 2019

Preprint

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With the rapid development of short-pulse intense laser sources, studies of matter under extreme irradiation conditions enter further unexplored regimes. In addition, an application of X-ray Free-Electron Lasers (XFELs), delivering intense femtosecond X-ray pulses allows to investigate sample evolution in IR pump -X-ray probe experiments with an unprecedented time resolution. Here we present the detailed study of periodic plasma created from the colloidal crystal. Both experimental data and theory modeling show that the periodicity in the sample survives to a large extent the extreme excitation and shock wave propagation inside the colloidal crystal. This feature enables probing the excited crystal, using the powerful Bragg peak analysis, in contrast to the conventional studies of dense plasma created from bulk samples for which probing with Bragg diffraction technique is not possible. X-ray diffraction measurements of excited colloidal crystals may then lead towards a better understanding of matter phase transitions under extreme irradiation conditions.

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Grating-like nanostructures formed by the focused fs laser pulse in the volume of transparent dielectric

Cited by 7 publications

References 32 publications

Genesis of Nanogratings in Silica Bulk via Multipulse Interplay of Ultrafast Photo‐Excitation and Hydrodynamics

Genesis of Nanogratings in Silica Bulk via Multipulse Interplay of Ultrafast Photo‐Excitation and Hydrodynamics

Internal Surface Plasmon Excitation as the Root Cause of Laser-Induced Periodic Plasma Structure and Self-Organized Nanograting Formation in the Volume of Transparent Dielectric

Femtosecond laser produced periodic plasma in a colloidal crystal probed by XFEL radiation

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