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Superresolution Microscopy of Single Rare-Earth Emitters in YAG and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>H</mml:mi><mml:mn>3</mml:mn></mml:mrow></mml:math> Centers in Diamond
We demonstrate superresolution imaging of single rare-earth emitting centers, namely, trivalent cerium, in yttrium aluminum garnet crystals by means of stimulated emission depletion (STED) microscopy. The achieved all-optical resolution is $\ensuremath{\approx}50\text{ }\text{ }\mathrm{nm}$. Similar results were obtained on $H3$ color centers in diamond. In both cases, STED resolution is improving …