Reference : The role of chiral local field enhancements below the resolution limit of Second Harm...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
The role of chiral local field enhancements below the resolution limit of Second Harmonic Generation microscopy
Valev, V. mailto [> >]
Clercq, B. [> >]
Zheng, X. [> >]
Denkova, D. [> >]
Osley, E. J. [> >]
Vandendriessche, S. [> >]
Silhanek, Alejandro mailto [Université de Liège - ULiège > Département de physique > Physique de la matière condensée >]
Volskiy, V. [> >]
Warburton, P. A. [> >]
Vandenbosch, G. A. [> >]
Ameloot, M. [> >]
Moshchalkov, V. A. [> >]
Verbiest, T. [> >]
Optics Express
Optical Society of America
Yes (verified by ORBi)
[en] plasmonics
[en] While it has been demonstrated that, above its resolution limit, Second Harmonic Generation (SHG) microscopy can map chiral local field enhancements, below that limit, structural defects were found to play a major role. Here we show that, even below the resolution limit, the
contributions from chiral local field enhancements to the SHG signal can dominate over those by structural defects. We report highly homogeneous SHG micrographs of star-shaped gold nanostructures, where the SHG circular dichroism effect is clearly visible from virtually every single nanostructure. Most likely, size and geometry determine the dominant contributions to the SHG signal in nanostructured systems.

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