Acoustic wave monitoring in pulsed laser interaction with materials

Abstract Ultrafast (or ultrashort) pulsed laser ablation of biological tissue has drawn much attention due to the minimal collateral damage caused by laser irradiation. Many clinical applications of ultrafast laser ablation have been proposed, including ophthalmology, dentistry, and neurosurgery (Kim et al., 1998). During ultrafast laser interaction with biological tissues, which are dielectric materials, multiphonon absorption occurs which enhances the absorption of the laser beam in tissue. The tissue can then be heated rapidly to a high temperature, causing evaporation and tissue removal.

Download Full-text

Numerical simulation of vaporization effect of long pulsed laser interaction with silicon

Optics and Precision Engineering ◽

10.3788/ope.20111902.0437 ◽

2011 ◽

Vol 19 (2) ◽

pp. 437-444 ◽

Cited By ~ 2

Author(s):

张梁 Zhang Liang ◽

倪晓武 NI Xiao-wu ◽

陆建 LU Jian ◽

刘剑 Liu Jian ◽

戴罡 Dai Gang

Keyword(s):

Numerical Simulation ◽

Pulsed Laser ◽

Laser Interaction

Download Full-text

Development of Pd/TiO2 Porous Layers by Pulsed Laser Deposition for Surface Acoustic Wave H2 Gas Sensor

Nanomaterials ◽

10.3390/nano10040760 ◽

2020 ◽

Vol 10 (4) ◽

pp. 760 ◽

Cited By ~ 2

Author(s):

Izabela Constantinoiu ◽

Cristian Viespe

Keyword(s):

Acoustic Wave ◽

Frequency Shift ◽

Pulsed Laser Deposition ◽

Surface Acoustic Wave ◽

Limit Of Detection ◽

Pulsed Laser ◽

Laser Deposition ◽

High Porosity ◽

Porous Films ◽

Sem Images

The influence of sensitive porous films obtained by pulsed laser deposition (PLD) on the response of surface acoustic wave (SAW) sensors on hydrogen at room temperature (RT) was studied. Monolayer films of TiO2 and bilayer films of Pd/TiO2 were deposited on the quartz substrates of SAW sensors. By varying the oxygen and argon pressure in the PLD deposition chamber, different morphologies of the sensitive films were obtained, which were analyzed based on scanning electron microscopy (SEM) images. SAW sensors were realized with different porosity degrees, and these were tested at different hydrogen concentrations. It has been confirmed that the high porosity of the film and the bilayer structure leads to a higher frequency shift and allow the possibility to make tests at lower concentrations. Thus, the best sensor, Pd-1500/TiO2-600, with the deposition pressure of 600 mTorr for TiO2 and 1500 mTorr for Pd, had a frequency shift of 1.8 kHz at 2% hydrogen concentration, a sensitivity of 0.10 Hz/ppm and a limit of detection (LOD) of 1210 ppm. SAW sensors based on such porous films allow the detection of hydrogen but also of other gases at RT, and by PLD method such sensitive porous and nanostructured films can be easily developed.

Download Full-text

Diffraction of pulsed laser radiation from an acoustic wave with frequency- and phase-shift keying

Technical Physics ◽

10.1134/s1063784209110139 ◽

2009 ◽

Vol 54 (11) ◽

pp. 1626-1632 ◽

Cited By ~ 2

Author(s):

S. N. Antonov ◽

A. V. Vainer ◽

V. V. Proklov ◽

Yu. G. Rezvov

Keyword(s):

Laser Radiation ◽

Phase Shift ◽

Acoustic Wave ◽

Pulsed Laser ◽

Phase Shift Keying ◽

Pulsed Laser Radiation ◽

Shift Keying

Download Full-text

Slim: a Personal Computer Based Software for Simulation of Laser Interaction with Materials

MRS Proceedings ◽

10.1557/proc-236-533 ◽

1991 ◽

Vol 236 ◽

Cited By ~ 1

Author(s):

Rajiv K. Singh ◽

John Viatella

Keyword(s):

Laser Irradiation ◽

Personal Computer ◽

Rapid Heating ◽

Pulsed Laser ◽

Laser Pulses ◽

Time Dependent ◽

Intense Laser ◽

Laser Interaction ◽

History Of ◽

Short Laser Pulses

AbstractA user-friendly, personal computer (PC) based routine called SLIM [Simulation of Laser Interaction with Materials] has been developed to understand the non-equilibrium effects of high intensity, short laser pulses on different materials. By employing an accurate implicit finite difference scheme with varying spatial and temporal node dimensions, the time-dependent thermal history of laser-irradiated material can be accurately and quickly determined. This program can take into account the temperature dependent optical and thermal properties of the solid, time dependent laser pulse intensity, and formation and propagation of the melt and/or vaporization interfaces induced by intense laser irradiation. The program can also simulate thermal effects on multilayer structures exposed to pulsed laser irradiation It is expected that this simulation routine will be indispensable to all researchers working in the area of pulsed laser processing of materials, including rapid heating, melting, annealing, laser doping, laser deposition of thin films and laser solidification processing.

Download Full-text