Nonlinear chiral imaging of subwavelength-sized twisted-cross gold nanodimers
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]
|Collections||ANU Research Publications|
|Source:||Optical Materials Express|
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