Title :
Photoacoustic study of nonradiative relaxation processes in YAG:Cr crystals
Author :
Sliwinski, A. ; Grinberg, M. ; Sikorska, A.
Author_Institution :
Inst. of Exp. Phys., Gdansk Univ., Poland
Abstract :
Nonradiative transitions were studied using photoacoustic spectroscopy in samples of YAG doped with chromium. Two theoretical models of energy coordination diagrams for YAG:Cr3+ and YAG:Cr4+ crystals were considered and two experimental cases corresponding to the annealed in hydrogen (Cr3+) and in oxygen (Cr4+) samples were examined. For the strongly luminescent sample YAG:Cr3+ the correction to PA signal due to the PA cell walls excitation must be taken into account
Keywords :
annealing; garnets; nonradiative transitions; photoacoustic spectra; yttrium compounds; YAG:Cr; YAG:Cr crystal; YAl5O12:Cr; annealing; cell wall excitation; energy coordination diagram; luminescent sample; nonradiative relaxation; nonradiative transition; photoacoustic spectroscopy; Absorption; Annealing; Chromium; Crystals; Hydrogen; Laser excitation; Luminescence; Particle beam optics; Solids; Spectroscopy;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.991653
