Enhanced Control of Quantum Dot Photoluminescence in Hybrid Assemblies

• DOI: 10.48550/arxiv.2109.08537
• Publication Date: 2021-01-01
• Authors: Anum Nisar; Harini Hapuarachchi; Laurent Lermusiaux; Jared H. Cole; Alison M. Funston
• Keywords: Quantum Control

The distance-dependent interaction of an emitter with a plasmonic nanoparticle or surface forms the basis field plexitonics. Semiconductor quantum dots (QDs) are robust emitters due to their photostability, and offer possibility understanding fundamental photophysics between one metal nanoparticle. A key enabling challenge is formation systems containing both QDs nanoparticles in high purity. We present translation DNA-based self-assembly techniques assemble semiconductor nanocrystals into discrete hybrid structures, including dimers, This method gives control over interparticle separation, geometry, ratio QD:metal nanoparticle, as well spectral properties metal/QD components assembly allow investigation plasmon-exciton interaction. assemblies show expected enhancement steady-state photoluminescence accompanied by increase QD emission rate for strong overlap localised plasmon resonance. In contrast, lengthening lifetime (a reduction rate) up 1.7-fold, along PL 15-75% observed upon detuning properties. understood terms Purcell effect, where gold acts damped, nanoscale cavity. Considering using generalised nonlocal optical response theory (GNOR) open system, driven interference experienced parallel perpendicular orientations. provides mechanism across much wider range lifetimes than previously understood.