5. Host matrices and associated effects
5.1 Different types of materials
The general principle for a "host" material (a solid matrix) to be easily doped with rare-earth ions is that, among its constituent ions, there must be an ion with no optical transition in the desired spectral range (neutral ion), preferably a trivalent one with an ionic radius close to 1 Å, which is the average value for all trivalent rare-earth ions.
SCROLL TO TOPTypical optically "neutral" ions for which rare earth ions can be substituted are La3+, Lu3+...
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Host matrices and associated effects
Some important rare earth ion applications
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