Optical resonators can alter quantum emitters' electromagnetic environment, thus modifying the spontaneous emission. This is known as the Purcell effect, widely regarded as the standard explanation of cavity-emitter interations. Here we show that this effect fails to properly address the emission modified by plasmonic resonators, i.e. a special type of metal cavities, where resonators can strongly affect the transition processes by charging the emitters. In particular, by integrating quantum dots (QDs) into a grating-like plasmonic resonator, we can transiently dope the QDs with a large amount of hot electrons that are produced during plasmon excitation. The doping makes the excited carriers greatly outnumber the absorbed photons, forming unusal asymmetric excitation" in individual QDs and yielding high-frequency radiative emission that can not be enabled by the Purcell enhancement. Our finding identifies a new cavity-emitter interaction pathway, initiating riveting opportunities for both fundamental studies and practical applications in laser, photovoltaics and photocatalysis.