1. The role of chiral local field enhancements below the resolution limit of Second Harmonic Generation microscopy
- Author
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Ventsislav K. Valev, Marcel Ameloot, Edward J. Osley, Paul A. Warburton, Victor Moshchalkov, Vladimir Volskiy, Alejandro Silhanek, Guy A. E. Vandenbosch, Ben De Clercq, Stefaan Vandendriessche, Denitza Denkova, Xuezhi Zheng, and Thierry Verbiest
- Subjects
spectroscopy ,Materials science ,2nd harmonic-generation ,Second-harmonic imaging microscopy ,Sensitivity and Specificity ,interfaces ,Optics ,Image Interpretation, Computer-Assisted ,origin ,surface ,arrays ,Local field ,defects ,Plasmon ,Microscopy ,business.industry ,Resolution (electron density) ,silicon ,Reproducibility of Results ,Second-harmonic generation ,Metamaterial ,Second Harmonic Generation Microscopy ,Image Enhancement ,Atomic and Molecular Physics, and Optics ,gold nanoparticles ,thin-films ,Surface second harmonic generation ,business ,Algorithms - Abstract
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 ispartof: Optics Express vol:20 issue:1 pages:256-264 ispartof: location:United States status: published
- Published
- 2011
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