Condensed Matter Seminar

Condensed Matter Seminar

Cooperative Dynamics of Quantum Emitters in Plasmonic Cavity

Date

May 16, 2019 - 3:00pm to 4:00pm

Location

Howey School of Physics

Room

N110

Affiliation

Center for Nonlinear Sciences, Los Alamos National Laboratory

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Abstract

Hybrid metal-semiconductor heterostructures represent tunable photonic materials with potential applications in coherent light sources. In such heterostructures, cooperative dynamics of excitons and photon-emission properties are strongly influenced by collective surface plasmon modes of metal nanoparticles constituting a plasmonic cavity. To gain insight into the cooperative dynamics of quantum emitters in such a cavity, we have developed a quantum mechanical approach treating the quantum emitter, surface plasmon, and photon decrees of freedom on the same footing. This allows us to account for multiple-scale interactions between plasmon modes and quantum emitters. Furthermore, the interactions can naturally be partitioned into coherent and incoherent couplings resulting in a generalized version of plasmonic Dicke model. Examination of associated phase diagram in both equilibrium and non-equilibrium regimes allows us to identify the polariton condensate, superradiant, and various lasing regimes. Finally, we performed numerical simulations of plasmonic response of a linear array formed by either metal nanorods or asymmetric metal nanoantennas. The calculations show that such nanostructures have potential for achieving strong coupling regime and realizing predicted cooperative regimes.