Polarized second harmonic response of square, hexagonal and random arrays of gold metallic nanocylinders

► We have measured the second harmonic response from arrays of gold nanocylinders. ► The SH response is incoherent in the transmission geometry. ► It results from the breaking of the centrosymmetry of the shape of the nanocylinders. ► No effect from the geometrical arrangement of the nanocylinders i...

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Bibliographic Details
Published in:Optical materials 2011-07, Vol.33 (9), p.1440-1444
Main Authors: Awada, Ch, Jonin, Ch, Kessi, F., Adam, P.M., Kostcheev, S., Bachelot, R., Royer, P., Samah, M., Russier-Antoine, I., Benichou, E., Bachelier, G., Brevet, P.F.
Format: Article
Language:English
Subjects:
Arrays
Gold
Gold nanocylinders arrays
Harmonic response
Nanocomposites
Nanomaterials
Nanostructure
Polarization dependence
Second Harmonic Generation
Surface defects
Two dimensional
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Summary:► We have measured the second harmonic response from arrays of gold nanocylinders. ► The SH response is incoherent in the transmission geometry. ► It results from the breaking of the centrosymmetry of the shape of the nanocylinders. ► No effect from the geometrical arrangement of the nanocylinders is observed. The vertically and horizontally polarized second harmonic responses from arrays of gold metallic nanocylinders with different two-dimensional spatial organization, namely square, hexagonal and random arrangements, have been determined in transmission as a function of the input fundamental polarization angle. The results demonstrate that the second harmonic response is incoherent, resulting from the breaking of the centrosymmetry of the shape of the nanocylinders by surface defects. As a result, no effect from the geometrical arrangement of the nanocylinders on the substrate is observed.
ISSN:0925-3467
1873-1252
DOI:10.1016/j.optmat.2011.02.045