What is laser ablation technique?

Laser ablation is a subtractive technique consisting of the fabrication of micropatterns through the removal (ablation) of small fractions of a substrate material under the action of a focused pulsed laser beam.

What is femtosecond laser ablation?

The mechanism of ablation of solids by intense femtosecond laser pulses is described in an explicit analytical form. It is shown that at high intensities when the ionization of the target material is complete before the end of the pulse, the ablation mechanism is the same for both metals and dielectrics.

What is capable of ablation?

Laser ablation has been considered and used for many technical applications, including: the production of nano materials, deposition of thin metallic and dielectric films, fabrication of superconducting materials, routine welding and bonding of metal parts, and micromachining of MEMS structures.

What is laser ablation in nanoparticles?

Laser ablation is a method for fabricating various kinds of nanoparticles including semiconductor quantum dots, carbon nanotubes, nanowires, and core shell nanoparticles. In this method, nanoparticles are generated by nucleation and growth of laser-vaporized species in a background gas.

What is the yield of laser ablation?

Laser ablation of soot particles with an average diameter of 250 nm gives rise to carbon NPs of 20–50 nm [134]. This technique is particularly of interest given applications of high surface area carbon and the availability of soot material as a “waste” for recycling.

What is ablation threshold?

The ablation threshold of the film is defined as the critical fluence (optical energy per area per pulse) which results in film removal within the irradiated spot area. If the fluence is too high significant damage can occur in the underlying insulation layer.

What are the laser ablation parameters?

During the laser ablation testing, the energy of the pulse laser is absorbed by the sample, depending on several characteristic parameters, such as the absorption coefficient, the heat conduction width, and the heat conduction depth [34].