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Shaping the photoluminescence from gold nanoshells by cavity plasmons in dielectric-metal core-shell resonators
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We report experimental investigation of the photoluminescence
(PL) generated from the gold nanoshells of the dielectric-metal core-shell resonators (DMCSR) that support multipolar electric and magnetic based cavity
resonances. Significantly enhanced and modulated PL
spectrum is observed. By comparing the experimental results with analytical Mie calculations, we are able to demonstrate that the observed reshaping effects are due to the excitations of those narrow-band cavity
resonances. We also present that the variation on the dielectric core size allows for tuning the cavity
resonance wavelengths and thus the peak positions of the PL
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