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(100)

Efficient Composite Colorization of Copper by Spatially Controlled Oxidation with Deep‐UV Ultrafast Lasers / Groussin, Baptiste (CERN) ; Martinez‐Calderon, Miguel (CERN) ; Beldarrain, Oihane (Navarra U.) ; Rodriguez, Ainara (Navarra U.) ; Olaizola, Santiago M (Navarra U.) ; Marsh, Bruce A (CERN) ; Granados, Eduardo (CERN)
Colorizing metals using micrometer and nanometer scale surface modifications has been vastly investigated and presents many advantages for applications across scientific and technological fields. By tuning the surface chemical composition or controlling its morphology, it is possible to produce a wide range of chromatic effects. [...]
2023 - 7 p. - Published in : 10.1002/adom.202302071 Fulltext: PDF;

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(91)

Gold-coated split laser-induced periodic surface structures as refractometric sensors / San-Blas, Alejandro (Donostia Intl. Phys. Ctr., San Sebastian ; Navarra U.) ; Elshorbagy, Mahmoud H (Mansoura U. ; Madrid U.) ; Olaizola, Santiago M (Donostia Intl. Phys. Ctr., San Sebastian ; Navarra U.) ; Sanchez-Brea, Luis M (Madrid U.) ; Rodríguez, Ainara (Donostia Intl. Phys. Ctr., San Sebastian ; Navarra U.) ; del Hoyo, Jesús (Madrid U.) ; Granados, Eduardo (CERN) ; Soria-Garcia, Angela (Madrid U.) ; Pastor-Villarrubia, Veronica (Madrid U.) ; Alda, Javier (Madrid U.)
The generation of surface plasmon resonances (SPR) in laser-induced periodic surface structures (LIPSS) allows their application in the field of optical sensing, such as the detection of refractive index variations in gases and liquids. We have fabricated gold-coated LIPSS nanostructures on stainless steel substrates by using femtosecond laser nano-ablation. [...]
2023 - 7 p. - Published in : Opt. Laser Tech. 157 (2023) 108669 Fulltext: PDF;

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(89)

Propagation of broadband coherent light through LIPSS-based metasurfaces in diamond / Echarri, Daniel T (CERN ; Navarra U.) ; San-Blas, Alejandro (Navarra U. ; Donostia Intl. Phys. Ctr., San Sebastian) ; Martinez-Calderon, Miguel (Navarra U. ; Donostia Intl. Phys. Ctr., San Sebastian) ; Olaizola, Santiago M (Navarra U. ; Donostia Intl. Phys. Ctr., San Sebastian) ; Granados, Eduardo (CERN)
We study the propagation of coherent broadband light through laser induced periodic surface structures (LIPSS) fabricated on diamond surfaces. 3D finite-difference time-domain (FDTD) simulations were carried out for a variety of experimentally produced LIPSS morphologies, which include the specific nanometer-scale mesoscopic irregularities arising from the fabrication technique. [...]
2022 - 11 p. - Published in : Optical Materials Express 12 (2022) 2415-2425 Fulltext: PDF;

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(67)

LIPSS manufacturing with regularity control through laser wavefront curvature / San-Blas, A (Navarra U.) ; Martinez-Calderon, M (Navarra U.) ; Granados, E (CERN) ; Gómez-Aranzadi, M (Navarra U.) ; Rodríguez, A (Navarra U.) ; Olaizola, S M (Navarra U.)
Laser-Induced Periodic Surface Structures (LIPSS) manufacturing is a convenient laser direct-writing technique for the fabrication of nanostructures with adaptable characteristics on the surface of virtually any material. In this paper, we study the influence of 1D laser wavefront curvature on nanoripples spatial regularity, by irradiating stainless steel with a line-focused ultrafast laser beam emitting 120 fs pulses at a wavelength of 800 nm and with 1 kHz repetition rate. [...]
2021 - 5 p. - Published in : Surfaces and Interfaces 25 (2021) 101205

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(61)

Highly uniform silicon nanopatterning with deep-ultraviolet femtosecond pulses / Granados, Eduardo (CERN) ; Martinez-Calderon, Miguel (CERN) ; Groussin, Baptiste (CERN) ; Colombier, Jean Philippe (Lab. Hubert Curien, St. Etienne) ; Santiago, Ibon
Abstract The prospect of employing nanophotonic methods for controlling photon–electron interactions has ignited substantial interest within the particle accelerator community. Silicon-based integrated dielectric laser acceleration (DLA) has emerged as a viable option by leveraging localized photonic effects to emit, accelerate, and measure electron bunches using exclusively light. [...]
2024 - 11 p. - Published in : Nanophoton. 13 (2024) 4079-4089 Fulltext: PDF;

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(47)

Propagation of broadband light pulses through LIPSS nanoripples fabricated on diamond / Talan Echarri, Daniel (CERN ; Navarra U.) ; San-Blas, Alejandro (Navarra U.) ; Martinez-Calderon, Miguel (CERN) ; Olaizola, Santiago M (Navarra U.) ; Granados, Eduardo (CERN)
We study the propagation of coherent broadband light through laser induced periodic surface structures (LIPSS) fabricated in diamond, by comparing the performance of the laser generated nanostructures with sinusoidal ideal structures in the near-IR. The simulations were carried out for a variety of LIPSS morphologies, including nanostructure aspect ratio and the irregularities arising from the LIPSS technique. [...]
2022 - Published in : Proc. SPIE 12143 (2022) 121430E
In : Nonlinear Optics and its Applications 2022, Strasbourg, France, 3 - 7 Apr 2022, pp.121430E

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(46)

Copper Surface Treatment with deep UV Ultrafast Laser for Improved Photocathode Photoemissive Properties / Groussin, B (CERN) ; Martinez Calderon, M (CERN) ; Marsh, B (CERN) ; Rossel, R (CERN) ; Granados, E (CERN)
Surface nanostructuring is a promising approach when it comes to improving the quantum efficiency (QE) of materials for electron accelerator purposes at CERN. This is due to the plasmonic effect taking place in metallic materials at the nanoscale, when an electromagnetic wave interacts with a sub-wavelength feature. [...]
2024 - 6 p. - Published in : J. Phys. : Conf. Ser.: 2687 (2024) , no. 3, pp. 032032
- Published in : JACoW IPAC: 2023 (2023) , pp. TUPA001 Fulltext: PublicationJACoW - PDF; PublicationIOP - PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.032032

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(29)

Performance of laser patterned copper plasmonic photocathodes / Martinez-Calderon, M (CERN) ; Groussin, B (CERN) ; Bjelland, V (CERN ; Norwegian U. Sci. Tech.) ; Chevallay, E (CERN) ; Himmerlich, M (CERN) ; Lorenz, P (Unlisted, DE) ; Marsh, B (CERN) ; Neupert, H (CERN) ; Rossel, R (CERN) ; Wuensch, W (CERN) et al.
We study ultrafast laser surface nanopatterning as an alternative to improve the photo-emissive properties of metallic photocathodes. By tailoring the physical dimensions of these surface nanostructures, one can localize the optical field intensity and exploit plasmonic effects occurring in such nanostructures. [...]
2024 - 6 p. - Published in : J. Phys. : Conf. Ser.: 2687 (2024) , no. 3, pp. 032033
- Published in : JACoW IPAC: 2023 (2023) , pp. TUPA003 Fulltext: PublicationJACOW - PDF; PublicationIOP - PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.032033

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(27)

Hot electron enhanced photoemission from laser fabricated plasmonic photocathodes / Martinez-Calderon, Miguel (CERN) ; Groussin, Baptiste (CERN) ; Bjelland, Victoria (CERN ; Norwegian U. Sci. Tech.) ; Chevallay, Eric (CERN) ; Fedosseev, Valentin N (CERN) ; Himmerlich, Marcel (CERN) ; Lorenz, Pierre ; Manjavacas, Alejandro ; Marsh, Bruce A (CERN) ; Neupert, Holger (CERN) et al.
Photocathodes are key elements in high-brightness electron sources and ubiquitous in the operation of large-scale accelerators, although their operation is often limited by their quantum efficiency and lifetime. Here, we propose to overcome these limitations by utilizing direct-laser nanostructuring techniques on copper substrates, improving their efficiency and robustness for next-generation electron photoinjectors. [...]
2023 - 9 p. - Published in : 10.1515/nanoph-2023-0552 Fulltext: PDF;

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High Gain Harmonic Generation UV to DUV Free Electron Lasers at the NSLS / Wu, J H ; Yu, L H
2001 IEEE Published version, local copy: PDF;
In : 19th IEEE Particle Accelerator Conference, Chicago, IL, USA, 18 - 22 Jun 2001, pp.e-proc. 2719

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