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Nonlinear chiral imaging of subwavelength-sized twisted-cross gold nanodimers

Huttunen, Mikko J.; Bautista, Godofredo; Decker, Manuel; Linden, Stefan; Wegener, Martin; Kauranen, Martti


We perform second-harmonic generation (SHG) microscopy with circularly polarized (CP) light to measure chirality of individual twisted-cross gold nanodimers. The chiral signatures, based on different SHG response for the two CP components of incident light, are clearly visible even with off-resonance excitation. The SHG responses of individual nanodimers are found to vary by about a factor of five. The technique thus has very high sensitivity to the nanoscale deformations of the structure. The...[Show more]

CollectionsANU Research Publications
Date published: 2011-04-22
Type: Journal article
Source: Optical Materials Express
DOI: 10.1364/OME.1.000046


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