Extended Data Fig. 3: Gate dependence of plasmonic resonance. | Nature Photonics

Extended Data Fig. 3: Gate dependence of plasmonic resonance.

From: Charge-depletion-enhanced WSe2 quantum emitters on gold nanogap arrays with near-unity quantum efficiency

Extended Data Fig. 3

a, PL spectrum of the WSe2 monolayer on a nanogap array under white light illumination. The ΔPL spectrum is defined as \({\boldsymbol{\Delta }}{\rm{PL}}=({I}_{{\rm{PL}}}^{{\,{\rm{nanogap}}}}-{I}_{{\rm{PL}}}^{{\,{\rm{SiO}}}_{2}})/({I}_{{\rm{PL}}}^{{\,{\rm{nanogap}}}}+{I}_{{\rm{PL}}}^{{\,{\rm{SiO}}}_{2}})\), where \({I}_{{\rm{PL}}}^{{\,{\rm{nanogap}}({\rm{SiO}}_{2}})}\) is the PL spectrum at the nanogap (SiO2) area. b and c, ΔPL spectrum as a function of the top gate and back gate, respectively.

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