All Stories

  1. Transverse Mode Instability in High-Power Yb-Doped Double-Clad Fiber Amplifiers: A Three-Layer Optical–Thermal Analysis Based on Stimulated Thermal Rayleigh Scattering

    Article • Micromachines, March 2026, MDPI AG

    Ricardo Samad

  2. Multigroup Energy Representation for Fast Monte Carlo Estimation of Radioisotope Yields from Electron-Beam Spectra

    Article • IEEE Transactions on Nuclear Science, January 2026, Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad

  3. Graphical user interface algorithms to retrieve cylindrically symmetric gas jet and laser-induced plasma densities from interferograms

    Article • Applied Optics, April 2025, Optical Society of America (OSA)

    Ricardo Samad

  4. Bayesian optimization of laser wakefield acceleration in the self-modulated regime (SM-LWFA) aiming to produce molybdenum-99 via photonuclear reactions

    Article • Physics of Plasmas, March 2025, American Institute of Physics

    Ricardo Samad

  5. Decomposition Method to Speed Up Optimization Loops Containing Monte Carlo Simulations to Estimate Radioisotope Production

    Article • November 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad

  6. Implementation of an Imaging System in a Spectrometer for Laser Accelerated Electrons

    Article • November 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad

  7. Development of an Imaging System for an Electron Spectrometer for laser-accelerated electrons

    Article • July 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad

  8. Ionization Model to Estimate the Density and Temperature Offs-Laser-Induced Plasmas in Air

    Article • July 2023, Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad

  9. Simulation of self-modulated laser wakefield acceleration using few TW in downramp injection and ionization injection regimes

    Article • Applied Optics, April 2023, Optical Society of America (OSA)

    Ricardo Samad

  10. Impact of He+N2 concentration on self-modulated laser wakefield acceleration driven by pulses of a few TW

    Article • Journal of the Optical Society of America B, March 2023, Optical Society of America (OSA)

    Ricardo Samad

  11. Femtosecond laser-plasma dynamics study by a time-resolved Mach–Zehnder-like interferometer

    Article • Applied Optics, February 2023, Optical Society of America (OSA)

    Ricardo Samad

  12. Below-threshold-harmonics-generation limitation due to laser-induced ionization in noble gases

    Article • February 2022, American Physical Society (APS)

    Ricardo Samad

  13. A review and simulation of laser driven compact electron accelerators at repetition rates of kHz.

    Article • AIP Advances, June 2021, American Institute of Physics

    Dr. Edison Puig Maldonado, Ricardo Samad

  14. Analytical Formulation of an Yb-doped Tandem-Pumping Fiber Amplifier

    Article • May 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad

  15. Modeling of Fiber Bragg Gratings with Different Lengths for the Reflectivity Control for Fiber Lasers

    Article • May 2021, Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad

  16. Low-loss pedestal Ta2O5 nonlinear optical waveguides

    Article • Optics Express, December 2019, Optical Society of America (OSA)

    Ricardo Samad

  17. Focus Tracking System for Femtosecond Laser Machining using Low Coherence Interferometry

    Article • Scientific Reports, March 2019, Springer Science + Business Media

    Ricardo Samad

  18. Determination of chicken meat contamination by porphyrin fluorescence

    Article • Journal of Luminescence, July 2018, Elsevier

    Ricardo Samad

  19. Optical properties and antimicrobial effects of silver nanoparticles synthesized by femtosecond laser photoreduction

    Article • Optics & Laser Technology, July 2018, Elsevier

    Ricardo Samad

  20. Interaction between protoporphyrin IX and tryptophan silver nanoparticles

    Article • Journal of Nanoparticle Research, June 2018, Springer Science + Business Media

    Ricardo Samad

  21. Can measurement of the fluorescence lifetime of extracted blood PPIX predict atherosclerosis?

    Article • Journal of Luminescence, March 2018, Elsevier

    Ricardo Samad

  22. Production and characterization of femtosecond laser-written double line waveguides in heavy metal oxide glasses

    Article • Optical Materials, January 2018, Elsevier

    Ricardo Samad

  23. Development of a dynamic interferometric focusing system for femtosecond laser machining

    Article • February 2017, SPIE

    Ricardo Samad

  24. Multimodal evaluation of ultra-short laser pulses treatment for skin burn injuries

    Article • Biomedical Optics Express, February 2017, Optical Society of America (OSA)

    Ricardo Samad, Dr Denise M Zezell

  25. Mercury Amalgam Diffusion in Human Teeth Probed Using Femtosecond LIBS

    Article • Applied Spectroscopy, January 2017, SAGE Publications

    Ricardo Samad, Dr Denise M Zezell

  26. Using femtosecond lasers to modify sizes of gold nanoparticles

    Article • April 2016, SPIE

    Ricardo Samad

  27. D-Scan Determination of BK7 Ultrashort Pulses Ablation Parameters Temporal Dependence

    Article • January 2016, Optical Society of America (OSA)

    Ricardo Samad

  28. Z-scan technique: A new concept for Diagnosis of Prostate Cancer in blood

    Article • January 2016, Optical Society of America (OSA)

    Ricardo Samad

  29. Synthesis of diamond-like phase from graphite by ultrafast laser driven dynamical compression

    Article • Scientific Reports, July 2015, Springer Science + Business Media

    Ricardo Samad

  30. Preparation and optimization of aminolevulinic acid with gold nanoparticles for photothermal and photodynamic therapies applications

    Article • June 2015, SPIE

    Ricardo Samad

  31. Determination of the AISI 1045 steel ablation threshold dependence on the pulse superposition using the Diagonal Scan (D-Scan) technique

    Article • March 2014, SPIE

    Ricardo Samad

  32. Harmonic Generation in Argon by Femtosecond Ti:Sapphire Laser

    Article • January 2014, Springer Science + Business Media

    Ricardo Samad

  33. Synthesis of silver nanoparticles using agar–agar water solution and femtosecond pulse laser irradiation

    Article • Colloids and Surfaces A Physicochemical and Engineering Aspects, April 2013, Elsevier

    Lilia Courrol, Ricardo Samad

  34. Study of Tryptophan Lifetime Fluorescence following Low-Density Lipoprotein Modification

    Article • Applied Spectroscopy, April 2013, SAGE Publications

    Lilia Courrol, Ricardo Samad

  35. Green synthesis of gold nanoparticles of different sizes and shapes using agar–agar water solution and femtosecond pulse laser irradiation

    Article • Applied Physics A, August 2012, Springer Science + Business Media

    Ricardo Samad

  36. Effects of Femtosecond Laser Irradiation on the Surfaces of Alumina and Alumina-Zirconia Composites

    Article • Materials Science Forum, August 2012, Trans Tech Publications

    Ricardo Samad

  37. D-Scan measurement of ablation threshold incubation effects for ultrashort laser pulses

    Article • Optics Express, February 2012, Optical Society of America (OSA)

    Ricardo Samad

  38. D-Scan Measurement of the Ablation Threshold and Incubation Parameter of Optical Materials in the Ultrafast Regime

    Article • Physics Procedia, January 2012, Elsevier

    Ricardo Samad

  39. Green synthesis of stable silver nanoparticles using Euphorbia milii latex

    Article • Colloids and Surfaces A Physicochemical and Engineering Aspects, September 2011, Elsevier

    Lilia Courrol, Ricardo Samad

  40. Microchannels Direct Machining using the Femtosecond Smooth Ablation Method

    Article • Physics Procedia, January 2011, Elsevier

    Ricardo Samad

  41. Ultrashort Laser Pulses Applications

    Article • November 2010, IntechOpen

    Ricardo Samad

  42. Fluorescence Properties of Colour Centres Produced by Ultrashort Laser Irradiation in LiF Crystals

    Article • Journal of Physics Conference Series, November 2010, Institute of Physics Publishing

    Ricardo Samad

  43. Determination of ablation threshold for composite resins and amalgam irradiated with femtosecond laser pulses

    Article • Laser Physics Letters, March 2010, Institute of Physics Publishing

    Ricardo Samad

  44. Production of color centers in PMMA by ultrashort laser pulses

    Article • Radiation Physics and Chemistry, March 2010, Elsevier

    Ricardo Samad

  45. Prospective ultramorphological characterization of human hair by optical coherence tomography

    Article • Skin Research and Technology, November 2009, Wiley

    Ricardo Samad

  46. Laser induced breakdown spectroscopy (LIBS) applied to stratigrafic elemental analysis and optical coherence tomography (OCT) to damage determination of cultural heritage Brazilian coins

    Article • July 2009, SPIE

    Ricardo Samad

  47. Roughness measurement methodology according to DIN 4768 using optical coherence tomography (OCT)

    Article • June 2009, SPIE

    Ricardo Samad

  48. Evaluation of laser induced breakdown spectroscopy for the determination of micronutrients in plant materials

    Article • Spectrochimica Acta Part B Atomic Spectroscopy, May 2009, Elsevier

    Ricardo Samad

  49. Applications of Europium Tetracycline Complex: A Review

    Article • Current Pharmaceutical Analysis, November 2008, Bentham Science Publishers

    Ricardo Samad

  50. Evaluation of laser induced breakdown spectroscopy for the determination of macronutrients in plant materials

    Article • Spectrochimica Acta Part B Atomic Spectroscopy, October 2008, Elsevier

    Ricardo Samad

  51. Determination of a dose-like curve for active colour centres produced in LiF single crystals by ultrashort high intensity laser pulses and a preliminary investigation of their spectral and spatial properties by confocal and atomic microscopies

    Article • Journal of Optics A Pure and Applied Optics, September 2008, Institute of Physics Publishing

    Ricardo Samad

  52. A 5 Hz flashlamp pumped Cr:LiSAF multipass amplifier for ultrashort pulses

    Article • Journal of Optics A Pure and Applied Optics, August 2008, Institute of Physics Publishing

    Ricardo Samad

  53. Diagonal scan measurement of Cr:LiSAF 20 ps ablation threshold

    Article • Applied Optics, February 2008, Optical Society of America (OSA)

    Ricardo Samad

  54. Production of defects in ZBLAN, ZBLAN:Tm3+ and ZBLAN:Cr3+ glasses by ultra-short pulses laser interaction

    Article • Journal of Physics and Chemistry of Solids, January 2008, Elsevier

    Sidney Ribeiro, Ricardo Samad

  55. Confocal and Atomic Force Microscopies of Color Centers Produced by Ultrashort Laser Irradiation in LiF Crystals

    Article • January 2008, American Institute of Physics

    Ricardo Samad

  56. Development of a TW Level Cr:LiSAF Multipass Amplifier

    Article • January 2008, American Institute of Physics

    Ricardo Samad

  57. Enhancement of Europium Emission Band of Europium Tetracycline Complex in the Presence of Cholesterol

    Article • Journal of Fluorescence, October 2007, Springer Science + Business Media

    Ricardo Samad

  58. Fluoride crystals growth and color center production by high intensity ultra short laser pulses

    Article • physica status solidi c, March 2007, Wiley

    Ricardo Samad

  59. Amplification of ultrashort pulses to 0.5 TW at 5 Hz with a flashlamp pumped Cr:LiSAF gain medium

    Article • February 2007, SPIE

    Ricardo Samad

  60. Determination of Cr:LiSAF crystals ablation thresholds on the 20 ps regime using a diagonal scan

    Article • February 2007, SPIE

    Ricardo Samad

  61. Europium tetracycline biosensor for the determination of cholesterol

    Article • February 2007, SPIE

    Ricardo Samad

  62. Study of color centers produced in thulium doped YLF crystals irradiated by electron beam and femtosecond laser pulses

    Article • Optics Communications, February 2007, Elsevier

    Ricardo Samad

  63. Stabilized color centers created by high-intensity ultra-short pulse laser in pure YLF crystals

    Article • Journal of Luminescence, January 2007, Elsevier

    Ricardo Samad

  64. 30 W Cr:LiSrAlF_6 flashlamp-pumped pulsed laser

    Article • Optics Letters, December 2006, Optical Society of America (OSA)

    Ricardo Samad

  65. Raman scattering investigation on structural and chemical disorder generated by laser ablation and mechanical microindentations of InSb single crystal

    Article • Journal of Applied Physics, September 2006, American Institute of Physics

    Ricardo Samad

  66. Development of a flashlamp-pumped Cr:LiSAF laser operating at 30 Hz

    Article • Applied Optics, May 2006, Optical Society of America (OSA)

    Ricardo Samad

  67. Development of a lamp-pumped Cr:LiSAF laser operating at 20Hz for a terawatt CPA system

    Article • February 2006, SPIE

    Ricardo Samad

  68. Enhancement of blue thulium emission on Nd:Yb:Tm-doped YLF crystals

    Article • February 2006, SPIE

    Ricardo Samad

  69. Color center production by femtosecond-pulse laser irradiation in fluoride crystals

    Article • Laser Physics, February 2006, Pleiades Publishing Ltd

    Ricardo Samad

  70. Geometrical method for determining the surface damage threshold for femtosecond laser pulses

    Article • Laser Physics, February 2006, Pleiades Publishing Ltd

    Ricardo Samad

  71. Production of stabilized color centers in YLiF4 crystals by high-intensity ultrashort laser pulses

    Article • Journal of the Optical Society of America B, December 2005, Optical Society of America (OSA)

    Ricardo Samad

  72. Study of point defects created by high-intensity ultrashort pulse laser in YLF crystals

    Article • March 2005, SPIE

    Ricardo Samad

  73. Color center production by femtosecond pulse laser irradiation in LiF crystals

    Article • Optics Express, January 2004, Optical Society of America (OSA)

    Ricardo Samad

  74. Spectroscopic study of ejected dental tissue after Er:YAG laser ablation

    Article • Journal of Luminescence, May 2003, Elsevier

    Ricardo Samad

  75. Analytical description of z-scan on-axis intensity based on the Huygens–Fresnel principle

    Article • Journal of the Optical Society of America B, November 1998, Optical Society of America (OSA)

    Ricardo Samad

  76. Determination of Ni2+ concentration dependence of the nonlinear refractive index of BaLiF3: Ni2+ crystal by the resonant Z-scan method

    Article • Solid State Communications, January 1998, Elsevier

    Ricardo Samad

  77. Study of point defects in ionic crystals created by high intensity ultrashort pulse laser

    Article • Institute of Electrical & Electronics Engineers (IEEE)

    Ricardo Samad