Both enhancement and strong coupling of quantum dots on asymmetric Fabry-Perot cavity at room temperature

Abstract

Abstract The interaction of light and matter is an eternal theme in optics and optoelectronics. Until now, there is almost no report about realization of both strong coupling and enhancement simultaneously. In this study, the angle-resolved photoluminescence spectra of colloidal quantum dots on the surface of SiO2/Si material are investigated. When the PL spectrum peak overlaps with the Fabry–Perot (F-P) mode of SiO2 film, the PL spectrum near emission wavelength of bare colloidal quantum dots splits into two peaks, which is Rabi splitting. Moreover, a huge enhancement factor is obtained for the PL spectra in the short-wavelength region. Both extremely huge enhancement and large Rabi splitting are obtained with colloidal quantum dots coupled low-refractive-index/high-refractive-index dielectric material system.