Melting-induced enhancement of the second-harmonic generation from metal nanoparticles

被引：16

作者：

Malvezzi, AM

Allione, M

Patrini, M

Stella, A

Cheyssac, P

Kofman, R

机构：

[1] Univ Pavia, INFM, I-27100 Pavia, Italy

[2] Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy

[3] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy

[4] Univ Nice, LPMC, UMR 6622, F-06108 Nice 2, France

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.89.087401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the generation of second-harmonic signals by irradiating monolayers of high purity Ga nanoparticles, embedded in a SiOx matrix, with femtosecond laser pulses at 800 nm. A remarkable melting-induced enhancement of the second-harmonic generation is observed in correspondence of the phase transition. In addition, the hysteresis cycle of nonlinear transmittance is shown to be amplified a factor of 80-100 with respect to the linear response and interpreted in the framework of a nonlinear effective-medium model.

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页码：1 / 087401

页数：4

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