8. Glossary
ions de terres rares; rare-earth ions
Ions (generally trivalent) from the lanthanide series (Ce 3+ to Yb 3+ ) of Mendeleev's table.
crystal field ; champ cristallin
Electrostatic field exerted by the ions surrounding the rare-earth ion in a solid material.
relaxation croisée; cross-relaxation
Energy transfer mechanism between two neighboring ions resulting in the excitation of a lower energy level than the one initially excited.
Addition de Photons par Transfert d'Énergie or APTE ; energy transfer up-conversion
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