Strong exciton−photon coupling with colloidal quantum dots in a tunable microcavity

Abstract

Polariton emission from optical cavities integrated with various luminophores has been extensively studied recently due to the wide variety of possible applications in photonics, particularly promising in terms of fabrication of low-threshold sources of coherent emission.Tuneable microcavities allow extensive investigation of the photophysical properties of matter placed inside the cavity by deterministically changing the coupling strength and controllable switching from weak to strong and ultra-strong coupling regimes. Here we demonstrate roomtemperature strong coupling of exciton transitions in CdSe/ZnS/CdS/ZnS colloidal quantum

Room-Temperature Strong Coupling between CdSe Nanoplatelets and a Metal–DBR Fabry–Pérot Cavity

“…15 Colloidal quantum dots (QDs) have also drawn significant attention as a well-investigated system for exploring strong light-matter coupling within optical cavities. [16][17][18] For instance, strong coupling has been demonstrated by in-tegrating colloidal QDs into a high-Q microcavity, resulting in a Rabi splitting of 24 -32 meV, 19 a phenomenon observed even with single QDs in a Fabry-Pérot cavity at room temperature. 20 However, limited oscillator strength 21 and comparatively broad fluorescence linewidth 3 of these QDs present challenges in achieving substantial Rabi splitting in such systems.…”