Seminar Announcement: Michael Scalora
Data pubblicazione: 17-set-2018 12.12.57
Thursday, 13 September 2018, 11:30
Sala Grande Palazzina C via alla Cascata 56/C
"Optics at the NANOSCALE: An Attempt at a Comprehensive Analysis of Surface Harmonic Generation...and more"
Charles M. Bowden Research Facility, AMRDEC, US Army RDECOM,
RDMR-WDS-R, Bldg. 7804 Redstone Arsenal, AL 35898
We present a study of linear and nonlinear optical effects that occur when light interacts with metallic surfaces and generic structures with nanometer-scale features. Our model suggests that the nonlinear optical analysis of metals, conductive oxides, nano-antennas, meta-surfaces, etc. should be performed by including nonlocal effects (viscosity and pressure of free electrons); linear and nonlinear contributions of bound (inner-core) electrons to the dielectric constant; linear and nonlinear quantum tunneling currents if gaps between nanoparticles is on the nanometer and sub-nanometer scale; and conditions generally reflective of discontinuous free electron densities. We use a modified hydrodynamic model to evaluate harmonic generation from a gold mirror, where epsilon- near-zero conditions may be found and exploited, and from semiconductors like GaAs and GaP.