Accession Number:

ADA609021

Title:

Nonlinear Electromagnetics and Coherent Energy Transfer in Negative-Index metamaterials

Descriptive Note:

Final rept. 1 Jun 2012-31 May 2014

Corporate Author:

WISCONSIN UNIV-STEVENS POINT

Personal Author(s):

Report Date:

2014-08-07

Pagination or Media Count:

7.0

Abstract:

An understanding was advanced of nonlinear propagation properties of electromagnetic EM waves in double-domain negativepositive index metamaterials MMs with focus on the coherent nonlinear-optical NLO energy transfer between the ordinary and backward waves BWs, i.e. the waves with contra-directed energy flux and phase velocity. A theory was developed and proof-of-principle computational studies were conducted of the outlined processes in the context of particular MMs and their unique potential applications to photonics. Numerical simulations were carried out of the multi-parametric dependences of the solutions to the set of partial differential wave equations accounting for the backwardness of one of the coupled waves. Frequency conversion, which stems from the NLO coupling of contra-propagating short pulses, was studied. A novel approach was proposed to engineering of the MMs, which support coexistence of phase-matched ordinary and BEM eigenmodes satisfying to three-wave mixing. It is based on negative spatial dispersion. A possibility to mimic the outlined extraordinary processes using stimulated Raman scattering on BW optical phonons was shown, which enables greatly enhanced amplification of ordinary Stokes signals.

Subject Categories:

  • Non-electrical Energy Conversion
  • Electricity and Magnetism
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE