Inducing exceptional points, enhancing plasmon quality and creating correlated plasmon states with modulated Floquet parametric driving.

ABSTRACT: The control of low frequency collective modes in solids by light presents important challenges and opportunities for condensed matter physics. We propose a method to parametrically drive low THz range collective modes in an interacting many body system using Floquet driving at optical frequencies with a modulated amplitude. We demonstrate that it can be used to design plasmonic time-varying media with singular dispersions. Plasmons near resonance with half the modulation frequency exhibit two lines of exceptional points connected by dispersionless states. Above a critical driving strength, resonant plasmon modes become unstable and undergo a continuous transition towards a crystal-like structure stabilized by interactions and nonlinearities. This new state breaks the discrete time translat

SUBMITTER: Kiselev EI 

PROVIDER: S-EPMC11568213 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature