Interface nano-confined acoustic waves in polymeric surface phononic crystals

Claudio Giannetti, Gabriele Ferrini, Francesco Banfi, Marco Travagliati, Damiano Nardi, Vitalyi Gusev, Pasqualantonio Pingue, Vincenzo Piazza

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

23 Citazioni (Scopus)

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.
Lingua originaleEnglish
pagine (da-a)N/A-N/A
RivistaApplied Physics Letters
Volume106
DOI
Stato di pubblicazionePubblicato - 2015

Keywords

  • LATTICE DYNAMICS
  • NON DESTRUCTIVE SENSING
  • PHONONIC CRYSTAL
  • POLYMERS
  • SURFACE ACOUSTIC WAVES
  • THERMOMECHANICS
  • ULTRAFAST OPTICS

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