Lifetimes of Confined Acoustic Phonons in Ultrathin Silicon Membranes

Cuffe, John; Ristow, Oliver; Chávez, Emigdio; Shchepetov, Andrey; Chapuis, Pierre-Olivier; Alzina, Francesc; Hettich, Mike; Ahopelto, Jouni; Dekorsy, Thomas; Prunnila, Mika; Sotomayor Torres, Clivia M.

Lifetimes of Confined Acoustic Phonons in Ultrathin Silicon Membranes

Dateien

Cuffe_247134.pdfGröße: 518.91 KBDownloads: 237

Datum

2013

Autor:innen

Cuffe, John

Ristow, Oliver

Chávez, Emigdio

Shchepetov, Andrey

Chapuis, Pierre-Olivier

Alzina, Francesc

Hettich, Mike

Ahopelto, Jouni

Dekorsy, Thomas

Prunnila, Mika

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Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review Letters. 2013, 110(9). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.095503

Zusammenfassung

We study the relaxation of coherent acoustic phonon modes with frequencies up to 500 GHz in ultrathin free-standing silicon membranes. Using an ultrafast pump-probe technique of asynchronous optical sampling, we observe that the decay time of the first-order dilatational mode decreases significantly from ∼4.7 ns to 5 ps with decreasing membrane thickness from ∼194 to 8 nm. The experimental results are compared with theories considering both intrinsic phonon-phonon interactions and extrinsic surface roughness scattering including a wavelength-dependent specularity. Our results provide insight to understand some of the limits of nanomechanical resonators and thermal transport in nanostructures.

Fachgebiet (DDC)

530 Physik

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ISO 690

CUFFE, John, Oliver RISTOW, Emigdio CHÁVEZ, Andrey SHCHEPETOV, Pierre-Olivier CHAPUIS, Francesc ALZINA, Mike HETTICH, Jouni AHOPELTO, Thomas DEKORSY, Mika PRUNNILA, Clivia M. SOTOMAYOR TORRES, 2013. Lifetimes of Confined Acoustic Phonons in Ultrathin Silicon Membranes. In: Physical Review Letters. 2013, 110(9). ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.110.095503

BibTex

@article{Cuffe2013Lifet-24713,
  year={2013},
  doi={10.1103/PhysRevLett.110.095503},
  title={Lifetimes of Confined Acoustic Phonons in Ultrathin Silicon Membranes},
  number={9},
  volume={110},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Cuffe, John and Ristow, Oliver and Chávez, Emigdio and Shchepetov, Andrey and Chapuis, Pierre-Olivier and Alzina, Francesc and Hettich, Mike and Ahopelto, Jouni and Dekorsy, Thomas and Prunnila, Mika and Sotomayor Torres, Clivia M.}
}

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