[en] We report our latest results on second harmonic generation (SHG) microscopy from arrays of G-shaped chiral gold nanostructures. The nanostructures are arranged in unit cells composed of four Gs, each rotated at 90° with respect to its neighbors. As it has already been demonstrated, for linearly polarized light, these unit cells yield a pattern of four SHG hotspots. However, upon increasing the pitch of the nanostructured arrays, extra hotspots can be observed at the edges of the unit cells. While the origin of these extra hotspots remains to be elucidated, their position indicates a relationship to coupling behavior between the unit cells.
Disciplines :
Physics
Author, co-author :
Valev, VK; Katholieke Universiteit Leuven - KUL
Osley, EJ; University College London - UCL
De Clercq, B; Universiteit Hasselt - UH
Silhanek, Alejandro ; Université de Liège - ULiège > Département de physique > Physique de la matière condensée
Warburton, PA; University College London - UCL
Aktsipetrov, OA; Lomonosov Moscow State University - MSU
Ameloot, M; Universiteit Hasselt - UH
Moshchalkov, VV; Katholieke Universiteit Leuven - KUL
Verbiest, T; Katholieke Universiteit Leuven - KUL
Language :
English
Title :
Second harmonic hotspots at the edges of the unit cells in G-shaped gold nanostructures
Publication date :
2012
Journal title :
Proceedings of SPIE: The International Society for Optical Engineering
ISSN :
0277-786X
eISSN :
1996-756X
Publisher :
International Society for Optical Engineering, Bellingham, United States - Washington
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