Paper 11770-25
Paper 11770-25
Harmonic generation at the nanoscale in strategic materials for nanophotonics (Keynote Presentation)
On demand 
Abstract
The use of semiconductors, metals and conductive oxides in the process of fabrication of actual nano devices is at the front edge of nowadays technology, exploiting the properties of light propagation and localization at nanometric scale in new and surprising ways. At these scales the usual theory describing the nonlinear (NL) effects of electromagnetic fields should be revisited and analyzed.
We report a collection of experimental results of nonlinear harmonic generation in different nanolayers: semiconductors, conductive oxides and metals. The comparison of these experimental results with numerical predictions of our theoretical model identifies, distinguishes and explains the different nonlinear contributions to the harmonics generated by these materials at nanoscale. Our model accounts for surface, magnetic and bulk nonlinearities arising from free and bound charges, preserving linear and nonlinear dispersion, nonlocal effects due to pressure and viscosity.
Presenter
Univ. Politècnica de Catalunya (Spain)
Crina Cojocaru received her MSc in Physics from the Univ. of Iasi, Romania in 1996 and the PhD degree in Physics at Polytechnic Univ. of Catalunya (UPC), Barcelona in 2002. After 2 years as a Marie Curie post-doc at LPN - CNRS in Paris, she joined the Physics Department at UPC, first as a post-doc researcher in 2004, later as a lecturer in 2006, and since 2008 she is permanent associate professor.
Her research covers different aspects of Photonics, focuses but not limited to linear and nonlinear optics in a variety of materials (photonic crystals, metamaterial, random structures, etc). During the last years she studied the nonlinear effects at nanometric scale, ultrashort laser pulse characterization, laser beam shaping by photonic crystals and non-destructive testing using laser induced ultrasound. She has published 85 articles, 5 book chapters and has participated in more than 90 international conferences with 30 invited talks.