Plasmonic enhancement of photoacoustic-induced reflection changes

Journal article (2021)

Authors

Guido De Haan Advanced Research Center for Nanolithography, Amsterdam, Universiteit van Amsterdam
Vanessa Verrina Universiteit van Amsterdam, Advanced Research Center for Nanolithography, Amsterdam
A.J.L. Adam ImPhys/Optics - AS
Hao Zhang Advanced Research Center for Nanolithography, Amsterdam
Paul C.M. Planken Advanced Research Center for Nanolithography, Amsterdam, Universiteit van Amsterdam
Research Group
ImPhys/Optics (AS) (TU Delft)
Copyright: © 2021 Guido De Haan, Vanessa Verrina, A.J.L. Adam, Hao Zhang, Paul C.M. Planken
DOI: https://doi.org/10.1364/AO.432659
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Published Date

2021

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Optics

Abstract

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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