| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 738960 | Optics & Laser Technology | 2016 | 5 Pages |
•This work is focused on the formation of laser-induced marks in transparent polymers activated by light-absorbing microparticles.•White- and dark-colored marks have been observed.•Generation of laser-induced marks is accompanied by laser-induced incandescence.•Laser-induced incandescence of laser-heated objects provides information about processes that occur in material substance under laser irradiation.
Interaction of highly viscous polystyrene suspensions of light-absorbing microparticles with pulsed radiation of a Q-switched YAG:Nd3+ laser is investigated. Absorption of laser radiation by the suspended microparticles causes thermal decomposition (pyrolysis) of the polymer in the vicinity of the overheated particles. Laser-induced incandescence (LII) of light-absorbing microparticles under irradiation by a sequence of laser pulses is observed. The mechanism of laser marking includes formation of light-absorbing and scattering centers by accumulation of carbonaceous and gaseous products of pyrolysis.
