[institut] Seminar ponedeljkom - Emilija Petronijevic

[Brana Jelenkovic]

Seminar

Emilija Petronijevic, PhD student
La Sapienza University of Rome, Nonlinear Photonics Lab:

Plasmonic properties of 2D periodic nanostructures: photo-acoustic 
detection of surface plasmon polaritons; Nonlinear optical properties of 
ZnWO4 crystals

Abstract
Plasmonics as an exciting field of nanophotonics paves the way towards 
the more efficient optical functional elements with applications in 
subwavelength microscopy, surface enhanced Raman spectroscopy (SERS) for 
biosensors, plasmonic waveguides, nonlinear photonic, photonic 
integrated circuits etc. Here we investigate the optical coupling of 
Surface plasmon polaritons (SPPs) in 2D periodic array of nanoholes 
etched in gold/chromium layer upon a glass substrate. We apply the 
scattering independent photo acoustic technique to detect SPPs measuring 
the absorption of the periodic structures. We further investigate the 
confinement of electrical field by means of Raman spectroscopy 
measurements. The experimental results are in good agreement with FDTD 
simulations.

In my first year I have been also working on the nonlinear optical 
characterization of ZnWO4 single crystals and ZnWO4-ZnO composites 
fabricated by means of micro-pulling down technique. We have measured 
Second harmonic generation in this supposedly centrosymmetric crystal, 
as well as the other interesting processes such as the emission induced 
by three-photon absorption and Raman scattering induced sum frequency 
generation. These are technologically important materials, with 
applications in X-ray and gamma-scintillators, solid state laser hosts, 
sensors etc.


Mesto U biblioteci Dragan Popovic Instituta za fiziku

Vreme Ponedeljak 26 oktobar, 2015, u 12 h



-- 
Brana Jelenkovic
Photonics Center
Institute of Physics
University of Belgrade