Nano-ablation of silica by plasmonic surface wave at low fluence

Wang, Lei; Cao, Xiaoyuan; Abid, Muhammad Irfan; Li, Qiankun; Tian, Wenjing; Chen, Qi‐Dai; Juodkazis, Saulius; Sun, Hong‐Bo

doi:10.1364/ol.42.004446

Cited by 19 publications

(8 citation statements)

References 24 publications

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“…Subsequent pulses interacting with these defects result scattered waves that interfere with each other, hence forming an intensity pattern that leads to the HSFL ripples. Also, the formation of periodic structures on glass surface under the ITO or ZnS layer was reported before [14,15]. In these cases, it was found that the underlying glass surface could be nano-fabricated using fluences amounting to ~25% of the ablation threshold of the glass.…”

Section: Introductionmentioning

confidence: 63%

Femtosecond LIPSS on indium-tin-oxide thin films at IR wavelengths

et al. 2022

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We performed the experimental and numerical investigation of laser-induced periodic surface structures (LIPSS) generated on indium-tin-oxide (ITO) thin films with femtosecond laser pulses in the infrared region. Using pulses between 1.6 and 2.4 µm central wavelength, we observed robust LIPSS morphologies with a wavelength-independent periodicity of 220 ± 20 nm. Supporting finite-difference time-domain calculations suggest that the surface forms are rooted in the field localization in the surface pits leading to a periodically increased absorption of the laser pulse energy that creates the observed periodic structures. Thus, the LIPSS process is independent of the pulse parameters and it is only determined by the sample used.

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Section: Introductionmentioning

confidence: 63%

Femtosecond LIPSS on indium-tin-oxide thin films at IR wavelengths

et al. 2022

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“…Similar fluences have been used in the experimental demonstrations of various effects of metasurfaces 30 , 37 . Studies have also shown that by using appropriately structured elements or more resilient plasmonic materials, the damage threshold can even exceed 100 mJ/cm² 38 , 39 , allowing us to scale up the X-ray output by increasing the electromagnetic field strength even further. An unstructured graphene sheet supports a strong field of 3 GV/m; 31 , 32 however, the edges of nanoribbons present strong field enhancements (~30).…”

Section: Resultsmentioning

confidence: 99%

Metasurface-based multi-harmonic free-electron light source

et al. 2018

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Metasurfaces are subwavelength spatial variations in geometry and material where the structures are of negligible thickness compared to the wavelength of light and are optimized for far-field applications, such as controlling the wavefronts of electromagnetic waves. Here, we investigate the potential of the metasurface near-field profile, generated by an incident few-cycle pulse laser, to facilitate the generation of high-frequency light from free electrons. In particular, the metasurface near-field contains higher-order spatial harmonics that can be leveraged to generate multiple higher-harmonic X-ray frequency peaks. We show that the X-ray spectral profile can be arbitrarily shaped by controlling the metasurface geometry, the electron energy, and the incidence angle of the laser input. Using ab initio simulations, we predict bright and monoenergetic X-rays, achieving energies of 30 keV (with harmonics spaced by 3 keV) from 5-MeV electrons using 3.4-eV plasmon polaritons on a metasurface with a period of 85 nm. As an example, we present the design of a four-color X-ray source, a potential candidate for tabletop multicolor hard X-ray spectroscopy. Our developments could help pave the way for compact multi-harmonic sources of high-energy photons, which have potential applications in industry, medicine, and the fundamental sciences.

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“…Within the electromagnetic scenario, the surface waves participating in establishing a standing pattern in interaction with the incoming light are often identified with the surface plasmon polaritons [89], coupling light and material. Recent advances proposed tuning of the optical properties of interfaces to allow for plasmonic processing [90]. Taking into account that particular optical conditions should apply to support plasmonic propagation in view of its dispersive behavior and the necessity to conserve momentum and energy, plasmonic waves were often considered to be the dominant contribution in the scattered surface wave.…”

Section: Focal Engineering and Near-field Processing: Sub-wavelength mentioning

confidence: 99%

Advances in ultrafast laser structuring of materials at the nanoscale

2020

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Laser processing implies the generation of a material function defined by the shape and the size of the induced structures, being a collective effect of topography, morphology, and structural arrangement. A fundamental dimensional limit in laser processing is set by optical diffraction. Many material functions are yet defined at the micron scale, and laser microprocessing has become a mainstream development trend. Consequently, laser microscale applications have evolved significantly and developed into an industrial grade technology. New opportunities will nevertheless emerge from accessing the nanoscale. Advances in ultrafast laser processing technologies can enable unprecedented resolutions and processed feature sizes, with the prospect to bypass optical and thermal limits. We will review here the mechanisms of laser processing on extreme scales and the optical and material concepts allowing us to confine the energy beyond the optical limits. We will discuss direct focusing approaches, where the use of nonlinear and near-field effects has demonstrated strong capabilities for light confinement. We will argue that the control of material hydrodynamic response is the key to achieve ultimate resolution in laser processing. A specific structuring process couples both optical and material effects, the process of self-organization. We will discuss the newest results in surface and volume self-organization, indicating the dynamic interplay between light and matter evolution. Micron-sized and nanosized features can be combined into novel architectures and arrangements. We equally underline a new dimensional domain in processing accessible now using laser radiation, the sub-100-nm feature size. Potential application fields will be indicated as the structuring sizes approach the effective mean free path of transport phenomena.

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Nano-ablation of silica by plasmonic surface wave at low fluence

Cited by 19 publications

References 24 publications

Femtosecond LIPSS on indium-tin-oxide thin films at IR wavelengths

Femtosecond LIPSS on indium-tin-oxide thin films at IR wavelengths

Metasurface-based multi-harmonic free-electron light source

Advances in ultrafast laser structuring of materials at the nanoscale

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