Surface acoustic waves based method to study photothermal response of plasmonic nano-objects and metasurfaces

V. E. Kaydashev; P. Timoshenko; M. Kutepov; G. Karapetyan; R. Kirtaev; E. M. Kaidashev

doi:10.1117/12.2559972

9 April 2020 Surface acoustic waves based method to study photothermal response of plasmonic nano-objects and metasurfaces

V. E. Kaydashev, P. Timoshenko, M. Kutepov, G. Karapetyan, R. Kirtaev, E. M. Kaidashev

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Proceedings Volume 11457, Saratov Fall Meeting 2019: Optical and Nano-Technologies for Biology and Medicine; 114570W (2020) https://doi.org/10.1117/12.2559972
Event: Saratov Fall Meeting 2019: VII International Symposium on Optics and Biophotonics, 2019, Saratov, Russian Federation

Abstract

We propose a new method to strudy photothermal effect in large arrays of coupled plasmonic nanoparticles based on monitoring of surface acoustic waves propagating in LiNbO₃ substrate. A photothermal effect induced by deposited nanosystem/metasurface results in SAW velocity alteration which a phase shift is detected. In proof-of-concept experiment the visible/near IR polarization/wavelength dependent photothermal responses of macroscopic monolayer of Au plasmonic coupled nanoparticles prepared by self-assembling and the one for larger isolated particles produced by heat treatment were characterized.

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V. E. Kaydashev, P. Timoshenko, M. Kutepov, G. Karapetyan, R. Kirtaev, and E. M. Kaidashev "Surface acoustic waves based method to study photothermal response of plasmonic nano-objects and metasurfaces", Proc. SPIE 11457, Saratov Fall Meeting 2019: Optical and Nano-Technologies for Biology and Medicine, 114570W (9 April 2020); https://doi.org/10.1117/12.2559972

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KEYWORDS

Plasmonics

Nanoparticles

Particles

Gold

Photothermal effect

Phase shifts

Acoustics

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