info:eu-repo/semantics/article
Mesoporous Thin Films for Acoustic Devices in the Gigahertz Range
Fecha
2020-06Registro en:
López Abdala, Nicolás Andrés; Esmann, Martin; Fuertes, María Cecilia; Angelome, Paula Cecilia; Ortiz, Omar; et al.; Mesoporous Thin Films for Acoustic Devices in the Gigahertz Range; American Chemical Society; Journal of Physical Chemistry C; 124; 31; 6-2020; 17165-17171
1932-7447
CONICET Digital
CONICET
Autor
López Abdala, Nicolás Andrés
Esmann, Martin
Fuertes, María Cecilia
Angelome, Paula Cecilia
Ortiz, Omar
Bruchhausen, Axel Emerico
Pastoriza, Hernan
Perrin, Bernard
Soler Illia, Galo Juan de Avila Arturo
Lanzillotti Kimura, Norberto Daniel
Resumen
The coherent manipulation of acoustic waves on the nanoscale usually requires multilayers with thicknesses and interface roughness defined down to the atomic monolayer. This results in expensive devices with predetermined functionality. Nanoscale mesoporous materials present a high surface-to-volume ratio and tailorable mesopores, which allow the incorporation of chemical functionalization to nanoacoustics. However, the presence of pores with sizes comparable to the acoustic wavelength is intuitively perceived as a major roadblock in nanoacoustics. Here, we present multilayered nanoacoustic resonators based on mesoporous SiO2 thin films showing acoustic resonances in the 5-100 GHz range. We characterize the acoustic response of the system using coherent phonon generation experiments. Despite resonance wavelengths comparable to the pore size, we observe for the first time well-defined acoustic resonances. Our results open the path to a promising platform for nanoacoustic sensing and reconfigurable acoustic nanodevices based on soft, inexpensive fabrication methods.