https://doi.org/10.1007/s100530170120
Second harmonic generation in Ga nanoparticle monolayers
1
INFM - Dip. Elettronica, Università di Pavia, Via Ferrata 1, I-27100 Pavia, Italy
2
INFM - Dip. Fisica "A. Volta" Università di Pavia, Via Bassi 6, I-27100 Pavia, Italy
3
Laboratoire de la Physique de la Matière Condensée,
Université de Nice Sophia Antipolis, 06108 Nice Cedex, France
Corresponding author: a malvezzi@ele.unipv.it
Received:
29
November
2000
Published online: 15 September 2001
Ga nanoparticle monolayers formed by evaporation-condensation in ultrahigh vacuum and embedded in a transparent SiOx matrix generate second harmonic (SH) signals in transmission and reflection when illuminated by a 150 fs, 800 nm laser pulses. The observed SH light exhibits a critical dependence on input and output polarizations, angle of incidence and azimuthal orientation of the samples. The results lead to a consistent picture of shape and orientation of the nanoparticles. Linear transmittance spectra in the visible range support these findings and the observed size dependence of the SH signal.
PACS: 78.66.Vs – Fine-particle systems / 61.25.Mv – Liquid metals and alloys / 42.65.Ky – Harmonic generation, frequency conversion
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
