Overcoming the barrier of nanoparticle production by femtosecond laser ablation in liquids using simultaneous spatial and temporal focusing

Doñate‐Buendía, Carlos; Fernández‐Alonso, Mercedes; Láncis, Jesús; Mínguez‐Vega, Gladys

doi:10.1364/prj.7.001249

Cited by 28 publications

(31 citation statements)

References 51 publications

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“…In Figure C, the magnitude of main scattering lobe can be further enhanced as the number of nanospheres increases. These results can be applied in ultra‐compact low loss optical devices …”

Section: Unidirectional Forward Scattering Of Multiple Nanospheresmentioning

confidence: 83%

Improvement of unidirectional scattering characteristics based on multiple nanospheres array

Jiang

Fang

Yan

et al. 2020

Micro & Optical Tech Letters

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All dielectric nanospheres with low loss and ultra-compact characteristics can be effectively applied in nanophotonics in the visible and infrared ranges. The unidirectional forward scattering with azimuthally symmetry can be achieved by simple dielectric nanosphere. The physical origin of this directionality can be attributed to the interference effect of electric and magnetic resonances induced in nanoshperes. For the forward scattering of a single nanosphere the spectrally overlapping resonance of electric and magnetic quadrupoles can further enhance the directionality and magnitude of unidirectional forward scattering. For a nanosphere homodimers, the scattering pattern can also preserve the azimuthal asymmetry and the suppression of backscattering. But, the side scattering lobes occur due to the grating diffraction effect. Furthermore, the significant improvement of scattering magnitude and directionality can be achieved by a linear chain of nanospheres. These unique optical scattering of nanoshperes can be applied in the fields of nanoantennas, photovoltaics, and nanolasers in visible and near infrared ranges.

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Section: Unidirectional Forward Scattering Of Multiple Nanospheresmentioning

confidence: 83%

Improvement of unidirectional scattering characteristics based on multiple nanospheres array

Jiang

Fang

Yan

et al. 2020

Micro & Optical Tech Letters

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“…Representative examples are given in Figure 1(n-s). These illustrate the concept of selforganization in the bulk [27,28], void generation [13,29], additive manufacturing [30], generation of nanoparticles via laser ablation [31], or, extending these concepts to soft and biological matter, nanosurgery and cell transfection [32,33]. All these illustrate a large range of structural manifestations on the nanoscale triggered by light and show that extreme scales can be achieved, exceeding the commonly assumed optical limits.…”

Section: Optical Limits In Laser Processing: the Challenge Of Confinementioning

confidence: 96%

“…Light-driven self-organization effects, singular phenomena that couple coherently light and matter, are illustrated in Figure 1(j-m), showing the transition from subwavelength periodic patterns to high-resolution regular patterns and then to multiscale relief and nanoscale roughness [22][23][24][25][26]. These functionalities are not limited to surfaces but they extend into the bulk, designing nanoscale arrangements in three dimensions [13,[27][28][29][30][31]. Representative examples are given in Figure 1(n-s).…”

Section: Optical Limits In Laser Processing: the Challenge Of Confinementioning

confidence: 99%

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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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“…Ultrashort laser pulses are a very demanded light source involved in many applications, for example in microscopy 1 , material processing 2 , particle acceleration 3 , nanoparticle production 4 , nonlinear processes 5 , 6 or attosecond pulse generation 7 . The characterization of those pulses is a key point for the understanding and optimization of those processes.…”

Section: Introductionmentioning

confidence: 99%

Robustness and capabilities of ultrashort laser pulses characterization with amplitude swing

Sola

Alonso

2020

Sci Rep

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In this work we firstly study the influence of different parameters in the temporal characterization of ultrashort laser pulses with the recently developed amplitude swing technique. In this technique, the relative amplitude of two delayed replicas is varied while measuring their second-harmonic spectra. Here we study the retrieval of noisy traces and the implications of having different delays or phase retardations (relative phases) between the two replicas. Then, we study the capability of the technique to characterize the pulses when the second-harmonic signal is spectrally uncalibrated or incomplete, presenting the analytical calculation of the marginal, which is used to calibrate the traces and to perform the pulse retrievals. We experimentally show the retrieval of different pulses using diverse delays and phase retardations to perform the amplitude swing trace and demonstrate that, from an uncalibrated trace, both the pulse information and the response of the nonlinear process can be simultaneously retrieved. In sum, the amplitude swing technique is shown to be very robust against experimental constraints and limitations, showing a high degree of soundness.

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Overcoming the barrier of nanoparticle production by femtosecond laser ablation in liquids using simultaneous spatial and temporal focusing

Cited by 28 publications

References 51 publications

Improvement of unidirectional scattering characteristics based on multiple nanospheres array

Improvement of unidirectional scattering characteristics based on multiple nanospheres array

Advances in ultrafast laser structuring of materials at the nanoscale

Robustness and capabilities of ultrashort laser pulses characterization with amplitude swing

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