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Interface nano-confined acoustic waves in polymeric surface phononic crystals

Marco Travagliati 1, 2 Damiano Nardi 3 Claudio Giannetti 4 Vitali Goussev 5 Pasqualantonio Pingue 2 Vincenzo Piazza 1 Gabriele Ferrini 4 Francesco Banfi 4
1 CNI - Center for Nanotechnology Innovation, @NEST
NEST - National Enterprise for nanoScience and nanoTechnology
2 NEST - National Enterprise for nanoScience and nanoTechnology
3 JILA - Joint Institute for Laboratory Astrophysics
4 UCSC - Università Cattolica del Sacro Cuore, Brescia
5 LAUM - Laboratoire d'Acoustique de l'Université du Mans
Abstract : The impulsive acoustic dynamics of soft polymeric surface phononic crystals is investigated here in the hypersonic frequency range by near-IR time-resolved optical diffraction. The acoustic response is analysed by means of wavelet spectral methods and finite element modeling. An unprecedented class of acoustic modes propagating within the polymer surface phononic crystal and confined within 100 nm of the nano-patterned interface is revealed. The present finding opens the path to an alternative paradigm for characterizing the mechanical properties of soft polymers at interfaces and for sensing schemes exploiting polymers as embedding materials.
Keywords : Acoustic waves Phononic crystal Spectral methods Thermal effects Finite-element analysis Vector fields Nanopatterning Acoustical properties Wave mechanics Acoustic phenomena
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Article dans une revue
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https://hal-univ-lemans.archives-ouvertes.fr/hal-02535952
Contributeur : Vitali Goussev <>
Soumis le : mardi 7 avril 2020 - 18:38:36
Dernière modification le : vendredi 30 avril 2021 - 15:02:02

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UNIV-LEMANS | CNRS | LAUM

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Marco Travagliati, Damiano Nardi, Claudio Giannetti, Vitali Goussev, Pasqualantonio Pingue, et al.. Interface nano-confined acoustic waves in polymeric surface phononic crystals. Applied Physics Letters, American Institute of Physics, 2015, 106 (2), pp.021906. ⟨10.1063/1.4905850⟩. ⟨hal-02535952⟩

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