Open AccessDynamics of transient absorption in bulk DKDP crystals following laser energy deposition
Author(s) -
Raluca A. Negres,
Rajesh N. Raman,
J. Bude,
Michael D. Feit,
Stavros G. Demos
Publication year - 2012
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.20.020447
Subject(s) - deposition (geology) , materials science , ultrafast laser spectroscopy , laser , optics , attenuation coefficient , absorption (acoustics) , relaxation (psychology) , transient (computer programming) , laser beams , thermal blooming , pulsed laser deposition , thermal , optoelectronics , composite material , physics , psychology , paleontology , social psychology , sediment , computer science , meteorology , biology , operating system
The transient changes in the optical properties of bulk DKDP material arising from its exposure to high temperatures and pressures associated with localized laser energy deposition are investigated. Two methods for initiation of laser-induced breakdown are used, intrinsic, involving relatively large energy deposition brought about by focusing of the laser beam to high intensities, and extrinsic, arising from more localized deposition due to the presence of pre-existing absorbing damage initiating defects. Each method leads to a very different volume of material being affected, which provides for different material thermal relaxation times to help better understand the processes involved.