Artículos de revistas
Second-harmonic generation from plasmon polariton excitation on silver diffraction gratings: Comparisons of theory and experiment
Fecha
2016-12Registro en:
Inchaussandague, Marina Elizabeth; Gigli, Miriam L.; O'donnell, Kevin A.; Méndez, Eugenio R.; Torre, Renato; et al.; Second-harmonic generation from plasmon polariton excitation on silver diffraction gratings: Comparisons of theory and experiment; Optical Society of America; Journal of the Optical Society of America B-Optical Physics; 34; 1; 12-2016; 27-37
0740-3224
CONICET Digital
CONICET
Autor
Inchaussandague, Marina Elizabeth
Gigli, Miriam L.
O'donnell, Kevin A.
Méndez, Eugenio R.
Torre, Renato
Valencia, Claudio I.
Resumen
We present a comparison between experimental and theoretical results for the diffraction efficiencies of the second harmonic light produced in the orders of silver diffraction gratings. The gratings considered are sinusoidal, havedepths of a few nanometers, and can produce significant surface plasmon polariton excitation at fundamental and second-harmonic frequencies. The calculations are based on a general expression for the nonlinear polarization ofthe surface of a homogeneous and isotropic medium, and the diffraction problems at the fundamental and harmonic frequencies are solved using a Rayleigh method. The silver gratings were fabricated using holographic lithographyand evaporative metal deposition techniques. The samples were illuminated with picosecond pulses of wavelength 1064 nm, and photon-counting techniques were used to study the diffracted orders at 532 nm, with absolutenormalization provided by a quartz reference. The diffracted orders exhibit anomalies and other features, many of which are related to plasmon polariton excitation at both fundamental and second-harmonic frequencies.Employing previously measured values for the nonlinear susceptibilities of a flat silver surface, remarkably good comparisons of theory and experiment are obtained for the second-harmonic order efficiencies.