Open AccessMoving force of metal particle migration induced by laser irradiation in borosilicate glass
Author(s) -
Hirofumi Hidai,
Makoto Matsushita,
Satoshi Matsusaka,
Akira Chibá,
Noboru Morita
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.018955
Subject(s) - borosilicate glass , materials science , particle (ecology) , laser , irradiation , surface tension , optics , metal , composite material , particle size , metallurgy , thermodynamics , chemistry , physics , oceanography , nuclear physics , geology
We optically manipulated a metal particle in borosilicate glass. The glass in the neighborhood of the laser-heated metal particle softened; hence, the metal particle was able to migrate in the glass. In this letter, the driving force of the metal particle toward the light source in the glass provided by laser illumination was investigated. The variation in the surface tension of the glass at the interface between the glass and the metal particle induced by the temperature gradient was calculated via a numerical temperature calculation. It was found that the temperature at the laser-illuminated surface of a stainless-steel particle with a radius of 40 μm was ~320 K higher than that on the nonilluminated side. The force applied to the metal particle from the surrounding glass was calculated to be ~100 μN, which was approximately equal to the viscous resistance force. In addition, the experimental and numerically calculated speeds of the moving particle, which was measured while varying the laser power, are discussed.