TY - JOUR
TI - Absorption profile of laser impulse of composites based on transparent matrix and metal nanoparticles
AU - Nikitin Andrey P
AU - Zvekov Alexander A
AU - Kalenskii Alexander V
AU - Ananeva Marina V
AU - Nurmukhametov Denis R
JN - Thermal Science
PY - 2019
VL - 23
IS - 12
SP - 553
EP - 560
PT - Article
AB - In this work the technique of modeling of optoacoustic signal initiated by  laser pulse in composites based on transparent matrix and metal  nanoparticles was proposed. It was shown that the time to achieve mechanical  equilibrium is significantly lower than the pulse duration, and pressure is  proportional to the augmentation of the nanoparticles' temperature. Testing  of the modeling technique was carried out on the example of PETN - aluminum  nanoparticles composite in two variant with and without taking into account  the temperature dependence of the composites' optical properties. Comparison  of calculated and experimental dependences of the effective absorption  coefficient on the energy density of neodymium laser with pulse duration 14  ns was made. The modeling results are in good agreement with the  experimental data only if the temperature dependence of the optical  properties is taken into account.