Fig. 5: Superscattering and near-unity quantum yield at room temperature.
From: Enhanced quantum coherence of plasmonic resonances with a chiral exceptional points
a Scattering spectrum \(\sigma \left({\Delta }_{L}\right)\) of hybrid CEP cavity for plasmon driving. The inset shows a close-up of \(\sigma \left({\Delta }_{L}\right)\) around \({\Delta }_{L}=0\). b, c Decomposition of cavity scattering \(\sigma \left({\Delta }_{L}\right)\) into the superscattering (\({\sigma }_{\sup }\)) and other (\({\sigma }_{{{{{{\rm{so}}}}}}}\)) terms for the cases of \(\phi =0\) and \(3\pi /2\), respectively. Parameters of these two cases are indicated by the green triangle and yellow star in Fig. 4a, respectively. The results of hybrid cavity without CEP are also shown for comparison (dashed lines). d, e Room-temperature quantum yield \(\eta\) of hybrid CEP cavity versus \({g}_{a}\) and \({g}_{1}\) for \({Q}_{c}={10}^{4}\) and \({10}^{3}\), respectively. \({\eta }_{0}\) denotes the quantum yield of hybrid cavity without CEP. \(\phi =0\) and \({\gamma }_{{{{{{\rm{p}}}}}}}=30{{{{{\rm{meV}}}}}}\), while other parameters are the same as Fig. 4a. f Comparison of room-temperature quantum yield versus laser frequency for various \({Q}_{c}\). The parameters are \(\phi =0\), \({g}_{1}=-15{{{{{\rm{meV}}}}}}\), \({g}_{a}=20{{{{{\rm{meV}}}}}}\) and \({\gamma }_{{{{{{\rm{p}}}}}}}=30{{{{{\rm{meV}}}}}}\) (solid lines). The quantum yield of hybrid cavity without CEP (black dashed line) and hybrid CEP cavity with \({\gamma }_{{{{{{\rm{p}}}}}}}=60{{{{{\rm{meV}}}}}}\) (dashed lines with the same color) are shown for comparison.
