Influence of phase transitions on the second harmonic generation in metal nanoparticles

S. Achilli; M. Allione; A. M. Malvezzi; M. Patrini; A. Stella; P. Cheyssac; R. Kofman

doi:10.1140/epjd/e2003-00192-7

Influence of phase transitions on the second harmonic generation in metal nanoparticles

S. Achilli^*, M. Allione, A. M. Malvezzi, M. Patrini, A. Stella, P. Cheyssac, R. Kofman

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

In this work we use nonlinear optical properties of Ga nanoparticles monolayers of different average sizes embedded in dielectric matrices to investigate the liquid-solid phase transitions in these materials. Ga nanoparticles, formed by exploiting the partial wetting of liquid Ga over a SiO_x surface are irradiated with fs laser pulses from a Ti:sapphire source. The resulting Second Harmonic (SH) generated in the reflection and transmission directions is measured along the phase transitions by cooling the sample from 320 K down to liquid nitrogen temperature. Hysteresis cycles are observed in the nonlinear transmission, which exhibit a strong amplification from the solid to liquid values as compared to the linear optical results. A simple model for SH generation, based on Mie scattering calculations which includes the effect of surface plasmon resonance provides a fair key for the interpretation of the observed effects.

Original language	English (US)
Pages (from-to)	223-226
Number of pages	4
Journal	European Physical Journal D
Volume	24
Issue number	1-3
DOIs	https://doi.org/10.1140/epjd/e2003-00192-7
State	Published - 2003
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1140/epjd/e2003-00192-7

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abstract = "In this work we use nonlinear optical properties of Ga nanoparticles monolayers of different average sizes embedded in dielectric matrices to investigate the liquid-solid phase transitions in these materials. Ga nanoparticles, formed by exploiting the partial wetting of liquid Ga over a SiOx surface are irradiated with fs laser pulses from a Ti:sapphire source. The resulting Second Harmonic (SH) generated in the reflection and transmission directions is measured along the phase transitions by cooling the sample from 320 K down to liquid nitrogen temperature. Hysteresis cycles are observed in the nonlinear transmission, which exhibit a strong amplification from the solid to liquid values as compared to the linear optical results. A simple model for SH generation, based on Mie scattering calculations which includes the effect of surface plasmon resonance provides a fair key for the interpretation of the observed effects.",

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T1 - Influence of phase transitions on the second harmonic generation in metal nanoparticles

AU - Achilli, S.

AU - Allione, M.

AU - Malvezzi, A. M.

AU - Patrini, M.

AU - Stella, A.

AU - Cheyssac, P.

AU - Kofman, R.

PY - 2003

Y1 - 2003

N2 - In this work we use nonlinear optical properties of Ga nanoparticles monolayers of different average sizes embedded in dielectric matrices to investigate the liquid-solid phase transitions in these materials. Ga nanoparticles, formed by exploiting the partial wetting of liquid Ga over a SiOx surface are irradiated with fs laser pulses from a Ti:sapphire source. The resulting Second Harmonic (SH) generated in the reflection and transmission directions is measured along the phase transitions by cooling the sample from 320 K down to liquid nitrogen temperature. Hysteresis cycles are observed in the nonlinear transmission, which exhibit a strong amplification from the solid to liquid values as compared to the linear optical results. A simple model for SH generation, based on Mie scattering calculations which includes the effect of surface plasmon resonance provides a fair key for the interpretation of the observed effects.

AB - In this work we use nonlinear optical properties of Ga nanoparticles monolayers of different average sizes embedded in dielectric matrices to investigate the liquid-solid phase transitions in these materials. Ga nanoparticles, formed by exploiting the partial wetting of liquid Ga over a SiOx surface are irradiated with fs laser pulses from a Ti:sapphire source. The resulting Second Harmonic (SH) generated in the reflection and transmission directions is measured along the phase transitions by cooling the sample from 320 K down to liquid nitrogen temperature. Hysteresis cycles are observed in the nonlinear transmission, which exhibit a strong amplification from the solid to liquid values as compared to the linear optical results. A simple model for SH generation, based on Mie scattering calculations which includes the effect of surface plasmon resonance provides a fair key for the interpretation of the observed effects.

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DO - 10.1140/epjd/e2003-00192-7

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SN - 1434-6060

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EP - 226

JO - European Physical Journal D

JF - European Physical Journal D

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Influence of phase transitions on the second harmonic generation in metal nanoparticles

Abstract

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