title: Dynamics of transient absorption in bulk DKDP crystals following laser energy deposition.
abstract: 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.
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA. negres2@llnl.gov
authors.forename: R A
authors.initials: RA
authors.lastname: Negres
authors.forename: R N
authors.initials: RN
authors.lastname: Raman
authors.forename: J D
authors.initials: JD
authors.lastname: Bude
authors.forename: M D
authors.initials: MD
authors.lastname: Feit
authors.forename: S G
authors.initials: SG
authors.lastname: Demos
mesh_terms: D000042:Absorption; D003198:Computer Simulation; D003460:Crystallization; D004735:Energy Transfer; D007834:Lasers; D008956:Models, Chemical; D010710:Phosphates / Q000737:chemistry* / Q000528:radiation effects*; D017680:Potassium Compounds / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage
chemical_list: D010710:Phosphates; D017680:Potassium Compounds; C013216:potassium phosphate