Synergetic Li–Ca Co‐Doping for Ce Valence Conversion in Yttrium Aluminum Garnet
2020; Wiley; Volume: 257; Issue: 12 Linguagem: Inglês
10.1002/pssb.202000243
ISSN1521-3951
AutoresK. L. Hovhannesyan, M. V. Derdzyan, Artur Novikov, A. G. Petrosyan, Christophe Dujardin,
Tópico(s)Terahertz technology and applications
ResumoHerein, optical‐quality single crystals of yttrium aluminum garnet (YAG):Ce,Ca,Li are grown by the vertical Bridgman method. Substitution and charge compensation mechanisms of Li + are considered based on optical absorption in as‐grown and γ‐ray‐irradiated single crystals and their luminescence decay and rise time under X‐ray excitation. The measurements are conducted on single crystals with impurity concentrations varying over a wide range. A suitable combination of Ca and Li concentration is able to control the cerium valence, which plays a major role in the time response under ionizing radiation.
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