Understanding and Controlling High Harmonic Generation Processes in Hybrid Materials at the Nanoscale

Project: Research project

Description

publically releasable.
Abstract
The goal of the proposed research program is to develop and apply rigorous theoretical/
computational models to quantitatively describe high harmonic generation (HHG)
processes at the nanoscale. The intent is to surpass the conventional approaches frequently
used in nanophotonics and to incorporate the nonlinear optical response of metal interfaces
into the state-of-the-art numerical solvers. The microscopic model describing quantum
dynamics of molecules will be combined with the nonlinear dispersive model for
metal. The developed model will be used to investigate a wide variety of optical phenomena
ranging from fundamental properties of HHG fields through their coherent control at
the nanoscale to understanding dynamics of high intense femtosecond laser pulses interacting
with hybrid (exciton-plasmon) nanomaterials. Furthermore, the model will be extended
beyond the mean field approximation in order to scrutinize the influence of entangled
states on HHG processes.
Three subprograms are proposed:
(1) High harmonic generation in hybrid nanomaterials
The goal of this part is to develop computational models describing nonlinear responses
of hybrid nanomaterials in time domain. To achieve this rigorous quantum mechanical
models of molecular excitons will be combined with the nonlinear hydrodynamic model
for metal interfaces.
(2) Applications of the nonlinear microscopic model
The nonlinear microscopic model developed and tested during the first stage of the program
will be applied to describe chiral hybrid nanomaterials and the optical bistability at
the nanoscale. For the first time chiral plasmonic materials of various topologies will be
considered in the nonlinear regime. HHG processes will be simulated in such systems.
The optical bistability phenomenon in hybrid nanosystems will be considered at high molecular
concentrations.
(3) Beyond mean field approximation
Further extension of the microscopic model will include quantum correlations between
molecules currently missing in the standard semiclassical models to understand how entangled
molecular states may influence HHG processes.
StatusActive
Effective start/end date11/1/1810/31/21

Funding

  • DOD-USAF-AFRL: Air Force Office of Scientific Research (AFOSR): $251,201.00

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harmonic generations
optical bistability
excitons
metals
topology
hydrodynamics
pulses
approximation
lasers
molecules