Controlling of spontaneous emission of quantum dots based on hyperbolic metamaterials

Abstract

The study of spontaneous emission has basic and supporting significance for enhancing the interaction between light and matter, solid-state lighting and biosensors. Hyperbolic metamaterials (HMMs) can support high k modes due to their hyperbolic dispersion characteristics, resulting in extremely high photon density, which affects spontaneous emission. Therefore, here we study the effect of HMMs on the spontaneous emission of quantum dots (QDs), and the Purcell factor reaches 20 times. At the same time, the structure of HMMs with gold nanoantennas is studied. The addition of gold nanoantennas further increases the Purcell factor to 120 times. In addition, the effects of the metal filling rate, the position and polarization direction of QDs on spontaneous emission enhancement and radiation power peak position are also studied. This provides a new perspective for enhancing and controlling spontaneous emission of QDs based on HMMs.