Combined roughness and electric polarization for the local-field enhancement of the second harmonic response from a silver-electrolyte interface

Y. El Harfouch, E. Benichou, I. Russier-Antoine, G. Bachelier, C. Jonin, L.E.A. Berlouis, P.F. Brevet

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A nanoscale rough silver film is electrodeposited from a silver cyanide aqueous solution and its growth is monitored by second harmonic generation (SHG). For growth by potential step into the diffusion controlled region, a maximum in the SHG intensity is always obtained for an equivalent silver film thickness of ∼60 nm, based on the charge consumed. The SH intensity decreases for thicker but smoother films. A study as a function of an applied static electric field for an already grown film shows that the combination of nanoscale roughness and electric polarization is able to yield large enhancement of SH signal intensities. From a microscopic analysis of the data, it is shown that the nonlinear surface current perpendicular to the interface exhibits a nonlinear dependence with the applied potential, owing to the combination of roughness and electric polarization.
LanguageEnglish
Article number113407
Number of pages4
JournalPhysical Review B
Volume79
Issue number11
DOIs
Publication statusPublished - 20 Mar 2009

Fingerprint

Silver
Electrolytes
roughness
Surface roughness
silver
electrolytes
Polarization
Harmonic generation
harmonics
augmentation
harmonic generations
polarization
Cyanides
cyanides
Film thickness
film thickness
Electric fields
aqueous solutions
electric fields

Keywords

  • diffusion
  • electrolytes
  • harmonic generation
  • metallic thin films
  • nanostructured materials
  • silver

Cite this

El Harfouch, Y. ; Benichou, E. ; Russier-Antoine, I. ; Bachelier, G. ; Jonin, C. ; Berlouis, L.E.A. ; Brevet, P.F. / Combined roughness and electric polarization for the local-field enhancement of the second harmonic response from a silver-electrolyte interface. In: Physical Review B. 2009 ; Vol. 79, No. 11.
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abstract = "A nanoscale rough silver film is electrodeposited from a silver cyanide aqueous solution and its growth is monitored by second harmonic generation (SHG). For growth by potential step into the diffusion controlled region, a maximum in the SHG intensity is always obtained for an equivalent silver film thickness of ∼60 nm, based on the charge consumed. The SH intensity decreases for thicker but smoother films. A study as a function of an applied static electric field for an already grown film shows that the combination of nanoscale roughness and electric polarization is able to yield large enhancement of SH signal intensities. From a microscopic analysis of the data, it is shown that the nonlinear surface current perpendicular to the interface exhibits a nonlinear dependence with the applied potential, owing to the combination of roughness and electric polarization.",
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Combined roughness and electric polarization for the local-field enhancement of the second harmonic response from a silver-electrolyte interface. / El Harfouch, Y.; Benichou, E.; Russier-Antoine, I.; Bachelier, G.; Jonin, C.; Berlouis, L.E.A.; Brevet, P.F.

In: Physical Review B, Vol. 79, No. 11, 113407 , 20.03.2009.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Combined roughness and electric polarization for the local-field enhancement of the second harmonic response from a silver-electrolyte interface

AU - El Harfouch, Y.

AU - Benichou, E.

AU - Russier-Antoine, I.

AU - Bachelier, G.

AU - Jonin, C.

AU - Berlouis, L.E.A.

AU - Brevet, P.F.

PY - 2009/3/20

Y1 - 2009/3/20

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AB - A nanoscale rough silver film is electrodeposited from a silver cyanide aqueous solution and its growth is monitored by second harmonic generation (SHG). For growth by potential step into the diffusion controlled region, a maximum in the SHG intensity is always obtained for an equivalent silver film thickness of ∼60 nm, based on the charge consumed. The SH intensity decreases for thicker but smoother films. A study as a function of an applied static electric field for an already grown film shows that the combination of nanoscale roughness and electric polarization is able to yield large enhancement of SH signal intensities. From a microscopic analysis of the data, it is shown that the nonlinear surface current perpendicular to the interface exhibits a nonlinear dependence with the applied potential, owing to the combination of roughness and electric polarization.

KW - diffusion

KW - electrolytes

KW - harmonic generation

KW - metallic thin films

KW - nanostructured materials

KW - silver

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DO - 10.1103/PhysRevB.79.113407

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