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Spectral control of elastic dynamics in metallic nano-cavities.

ABSTRACT: We show how the elastic response of metallic nano-cavities can be tailored by tuning the interplay with an underlying phononic superlattice. In particular, we exploit ultrafast optical excitation in order to address a resonance mode in a tungsten thin film, grown on top of a periodic MgO/ZrO₂ multilayer. Setting up a simple theoretical model, we can explain our findings by the coupling of the resonance in the tungsten to an evanescent surface mode of the superlattice. To demonstrate a second potential benefit of our findings besides characterization of elastic properties of multilayer samples, we show by micromagnetic simulation how a similar structure can be utilized for magneto-elastic excitation of exchange-dominated spin waves.

SUBMITTER: Ulrichs H

PROVIDER: S-EPMC5587714 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Spectral control of elastic dynamics in metallic nano-cavities.

Ulrichs Henning H Meyer Dennis D Döring Florian F Eberl Christian C Krebs Hans-Ulrich HU

Scientific reports 20170906 1

We show how the elastic response of metallic nano-cavities can be tailored by tuning the interplay with an underlying phononic superlattice. In particular, we exploit ultrafast optical excitation in order to address a resonance mode in a tungsten thin film, grown on top of a periodic MgO/ZrO<sub>2</sub> multilayer. Setting up a simple theoretical model, we can explain our findings by the coupling of the resonance in the tungsten to an evanescent surface mode of the superlattice. To demonstrate a ...[more]

PMID: 28878294

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