Plasmonic enhancement of photoacoustic-induced reflection changes | Zendy

G. de Haan | Zendy; Vanessa Verrina | Zendy; A. J. L. Adam | Zendy; Hao Zhang | Zendy; P. C. M. Planken | Zendy

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Plasmonic enhancement of photoacoustic-induced reflection changes

Author(s) -

G. de Haan,

Vanessa Verrina,

A. J. L. Adam,

Hao Zhang,

P. C. M. Planken

Publication year - 2021

Publication title -

applied optics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.668

H-Index - 197

eISSN - 2155-3165

pISSN - 1559-128X

DOI - 10.1364/ao.432659

Subject(s) - optics , reflection (computer programming) , surface plasmon polariton , resonance (particle physics) , surface plasmon resonance , surface plasmon , materials science , longitudinal mode , plasmon , longitudinal wave , grating , polariton , surface wave , laser , wave propagation , physics , particle physics , computer science , nanoparticle , programming language , nanotechnology

In this paper, we report on surface-plasmon-resonance enhancement of the time-dependent reflection changes caused by laser-induced acoustic waves. We measure an enhancement of the reflection changes induced by several acoustical modes, such as longitudinal, quasi-normal, and surface acoustic waves, by a factor of 10-20. We show that the reflection changes induced by the longitudinal and quasi-normal modes are enhanced in the wings of the surface plasmon polariton resonance. The surface acoustic wave-induced reflection changes are enhanced on the peak of this resonance. We attribute the enhanced reflection changes to the longitudinal wave and the quasi-normal mode to a shift in the surface plasmon polariton resonance via acoustically induced electron density changes and via grating geometry changes.

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