Femtosecond Laser Irradiation for Hot Spots Mapping on the Surface of Plasmonic Nanostructures

In this research, we present a novel method for visualising plasmonic `hot spots` upon plsmonic surfaces of gold nanostructures. Femtosecond laser pulses have been used to map the locations of localised high intensity electromagnetic fields i.e. the locations of hot spots. Upon irradiation with 800 nm femtosecond laser pulses, which may be linearly or circularly polarised, it is possible to reveal the locations of plasmonic hot spots since the nanostructures are physically damaged i.e. undergo melting by the intense heat generated by femtosecond laser pulse irradiation. 

Author(s): Nadia A. Abdulrahman 

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