Thursday, May 16 2019
3:00pm - 4:00pm
Howey School of Physics, Room N110
free
For more information:

tara.davis@physics.gatech.edu

Add To My Calendar
Cooperative Dynamics of Quantum Emitters in Plasmonic Cavity

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.

Click images in enlarge.