Near-Field Transmission Measurement of Gold Nanorods

2 Near-Field Transmission Measurement of Gold Nanorods [68] 

Plasmon modes with odd parity characters are dipolar forbidden because no polarization is created upon photo-excitation. Observation of the odd plasmon mode in Fig.4.7d indicates that the optically forbidden mode becomes optically allowed by the local illumination of the near-fleld. It is also noted that observation of the wavefunction image indicates that the coherence of the polarization wave extends from the tip position to the whole area of the nanorod. 

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