Plasmonic nanoresonators consisting of a gold nanorod and spherical silica core shell, both coated with gain layer, were optimized to maximize the stimulated emission in near-field (NF-c-type) outcoupling into far-field (FF-c-type) enter spasing operation region (NF-c*-type). It was shown that case moderate dye concentration, has more advantages: smaller lasing threshold larger slope efficiency...
