The role of chiral local field enhancements below the resolution limit of Second Harmonic Generation microscopy

V. K. Valev, B. D. Clercq, X. Zheng, D. Denkova, E. J. Osley, S. Vandendriessche, A. V. Silhanek, V. Volskiy, P. A. Warburton, G. A E Vandenbosch, M. Ameloot, V. V. Moshchalkov, T. Verbiest

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36 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)256-264
Number of pages9
JournalOptics Express
Volume20
Issue number1
DOIs
Publication statusPublished - 2 Jan 2012

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    Valev, V. K., Clercq, B. D., Zheng, X., Denkova, D., Osley, E. J., Vandendriessche, S., Silhanek, A. V., Volskiy, V., Warburton, P. A., Vandenbosch, G. A. E., Ameloot, M., Moshchalkov, V. V., & Verbiest, T. (2012). The role of chiral local field enhancements below the resolution limit of Second Harmonic Generation microscopy. Optics Express, 20(1), 256-264. https://doi.org/10.1364/OE.20.000256