A high-quality factor hybrid plasmonic nanocavity based on distributed Bragg reflectors

Tu Linlin¹, Zhang Chi¹, Huang Zhong¹, Yau Jason^{1, 3}, Zhan Peng^{1, 2, †,}, Wang Zhenlin^{1, 2, ‡,}

(a) Transmission spectrum of a 10-period DBR (upper panel) and transmission spectra of hybrid plasmonic nanocavity composed of two 5-period DBRs with different L₂ (bottom panel). Insets are the schematics of each structure. (b) Dependence of the wavelength of the resonant peak and Purcell factor on the length L₂, varied from 76 nm to 176 nm at a step of 10 nm (L₁ = 770 nm).