Abstract
| Original language | English |
|---|---|
| Article number | 113407 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 79 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 20 Mar 2009 |
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Keywords
- diffusion
- electrolytes
- harmonic generation
- metallic thin films
- nanostructured materials
- silver
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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 journal › Article
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
N2 - 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.
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
U2 - 10.1103/PhysRevB.79.113407
DO - 10.1103/PhysRevB.79.113407
M3 - Article
VL - 79
JO - Physical Review B: Condensed Matter and Materials Physics
JF - Physical Review B: Condensed Matter and Materials Physics
SN - 1098-0121
IS - 11
M1 - 113407
ER -