Session 4-1

Abstract

Current nanofabrication technologies enable the precise integration of semiconductor quantum emitters, such as quantum dots or nanoplatelets, with metal nanoparticles exhibiting tunable surface plasmon resonances. This integration allows for control over interaction pathways between quantum emitters and plasmonic modes, leading to new functionalities essential for on-chip optoelectronic devices.[1] A well-studied phenomenon in these hybrid materials is the acceleration of spontaneous light emission due to enhancing the photon density of states by surface plasmons, known as the plasmonic Purcell effect.[1] This talk presents theoretical studies and simulation results of optical phenomena in hybrid semiconductor-metal materials beyond the Purcell effect. Specifically, it discusses metal nanopillar arrays forming a plasmonic cavity (Inset to Fig. 1) where quantum dots experience strong coupling with collective surface lattice resonances, forming exciton-plasmon polariton states. The model calculations, supported by FDTD simulations, predict significant enhancement of second harmonic generation and second harmonic lasing above a certain exciton-plasmon coupling threshold (Fig. 1). Additionally, the study explores parametric amplification and spontaneous parametric downconversion (SPDC) in arrays of metal nanoparticles with C2v symmetry (Fig. 2a), showing that single-layer arrays of L-shaped nanoparticles can yield quantum photon production (Fig. 2b) compatible with standard SPDC sources.[3]