Photo-thermal effect in strongly coupled gold plasmonic nanoparticles and Au/VO2 composites probed by surface acoustic waves
Vladimir E. Kaydashev,1 Boris N. Khlebtsov,2 Andrey Miakonkikh,3 Maxim Kutepov,1 Roman Kirtaev,4 Gevork Y. Karapetyan,1 Evgeni M. Kaidashev1, 1 Laboratory of Nanomaterials, Southern Federal University, Rostov-on-Don, Russia 2Institute of Biochemistry and Physiology of Plants and microorganisms RAS, Saratov, Russia
3 Valiev Institute of Physics and Technology RAS, Moscow, Russia
4 Moscow Institute of Physics and Technology, Dolgoprudny, Russia
Abstract
Functional metasurfaces switched by light patterns are expected to become a new paradigm in flat optics. Strongly coupled plasmonic nanoparticles with sub-10 nm gaps do provide tight near field focusing of the incident electromagnetic energy which boosts the photo induced switching of theramally controlled metasurface elements. We continue develop our recently proposed method to study photo-thermal response of macroscopic arrays of deposited plasmonic nanoparticles using surface acoustic waves [Proc. of SPIE 11457, 2020]. Photothermal response of several types of large arrays of Au based plasmonic objects and Au/VO2 composites on LiNbO3 substrate are characterized. Surface acoustic wave phase shift and attenuation are used to characterize heating of barely plasmonic systems and conductivity variation of thermally switchable composites, correspondingly
Speaker
Vladimir E. Kaydashev
Southern Federal Unviersity
Russia
Discussion
Ask question
