Journal
OPTICS EXPRESS
Volume 20, Issue 1, Pages 256-264Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.000256
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Funding
- Fund for scientific research Flanders (FWO-V)
- K.U. Leuven (GOA)
- Flemish government
- Belgian Inter-University Attraction Poles IUAP
- FWO-Vlaanderen
- Engineering and Physical Sciences Research Council [EP/H005544/1] Funding Source: researchfish
- EPSRC [EP/H005544/1] Funding Source: UKRI
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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. (C) 2011 Optical Society of America
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