Characterization of X-ray radiation from solid Sn target irradiated by femtosecond laser pulses in the presence of air plasma sparks

AbstractThe emission of X-rays from solid tin targets irradiated by low-energy (few mJ) femtosecond laser pulses propagated through air plasma sparks is investigated. The aim is that to better understand the X-ray emission mechanism and to show the possibility to produce proper radiation for spectroscopic and imaging applications with a table-top laser system. The utilization of a controlled ultrashort prepulse is found necessary to optimize the conversion efficiency of laser energy into Lα radiation. The optimum contrast between the main pulse and the controlled prepulse is found about 102. A correlation between the laser contrast value and the laser near-infrared spectra at the exit of the plasma spark is observed.

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Laser energy absorption and x-ray generation in nanowire arrays irradiated by relativistically intense ultra-high contrast femtosecond laser pulses

Physics of Plasmas ◽

10.1063/5.0064364 ◽

2022 ◽

Vol 29 (1) ◽

pp. 013301

Author(s):

E. Eftekhari-Zadeh ◽

M. S. Blümcke ◽

Z. Samsonova ◽

R. Loetzsch ◽

I. Uschmann ◽

...

Keyword(s):

Femtosecond Laser ◽

Energy Absorption ◽

Laser Energy ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

Nanowire Arrays ◽

High Contrast ◽

X Ray ◽

Laser Energy Absorption

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Characteristic X-rays generation under the action of femtosecond laser pulses on nano-structured targets

Laser and Particle Beams ◽

10.1017/s026303461100022x ◽

2011 ◽

Vol 29 (2) ◽

pp. 249-254 ◽

Cited By ~ 20

Author(s):

A.V. Ovchinnikov ◽

O.F. Kostenko ◽

O.V. Chefonov ◽

O.N. Rosmej ◽

N.E. Andreev ◽

...

Keyword(s):

Femtosecond Laser ◽

Line Emission ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

Relative Increase ◽

Metal Foil ◽

X Rays ◽

Fast Electrons ◽

X Ray ◽

Vacuum Heating

AbstractEnhancement of Kα yield from a metal foil covered with metal rods of submicron sizes, with low aspect ratio, irradiated by a p-polarized femtosecond laser pulses of about 1017 W/cm2 intensity is demonstrated. Obtained relative increase in Kα X-ray line emission is explained with a model of vacuum heating of fast electrons.

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Regulating disordered plasmonic nanoparticles into polarization sensitive metasurfaces

Nanophotonics ◽

10.1515/nanoph-2020-0651 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Shulei Li ◽

Mingcheng Panmai ◽

Shaolong Tie ◽

Yi Xu ◽

Jin Xiang ◽

...

Keyword(s):

Femtosecond Laser ◽

Spatial Resolution ◽

Metallic Nanoparticles ◽

Near Infrared ◽

Optical Memory ◽

Laser Pulses ◽

Femtosecond Laser Pulses ◽

Optical Diffraction ◽

Plasmonic Nanoparticles ◽

Direct Laser

Abstract Metasurfaces composed of regularly arranged and deliberately oriented metallic nanoparticles can be employed to manipulate the amplitude, phase and polarization of an incident electromagnetic wave. The metasurfaces operating in the visible to near infrared spectral range rely on the modern fabrication technologies which offer a spatial resolution beyond the optical diffraction limit. Although direct laser writing is an alternative to the fabrication of nanostructures, the achievement of regular nanostructures with deep-subwavelength periods by using this method remains a big challenge. Here, we proposed and demonstrated a novel strategy for regulating disordered plasmonic nanoparticles into nanogratings with deep-subwavelength periods and reshaped nanoparticles by using femtosecond laser pulses. The orientations of the nanogratings depend strongly on the polarization of the femtosecond laser light. Such nanogratings exhibit reflection and polarization control over the reflected light, enabling the realization of polarization sensitive optical memory and color display with high spatial resolution and good chromacity.

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