Title :

Subterahertz hypersound attenuation in silica glass studied via picosecond acoustics

Author(s) :

Ayrinhac, Simon [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Foret, Marie [Auteur correspondant]
Laboratoire Charles Coulomb [L2C]
Devos, Arnaud [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Ruffle, Benoit [Auteur]
Laboratoire Charles Coulomb [L2C]
Courtens, Eric [Auteur]
Laboratoire Charles Coulomb [L2C]
Vacher, René [Auteur]
Laboratoire Charles Coulomb [L2C]

Journal title :

Physical Review B: Condensed Matter and Materials Physics (1998-2015)

Pages :

014204

Publisher :

American Physical Society

Publication date :

2011

ISSN :

1098-0121

HAL domain(s) :

Physique [physics]/Mécanique [physics]/Mécanique des matériaux [physics.class-ph]
Physique [physics]/Mécanique [physics]/Acoustique [physics.class-ph]

English abstract : [en]

We report picosecond acoustic measurements in silica-glass films grown by wet thermal oxidation on a (111) silicon substrate. The longitudinal acoustic phonons are observed over the range from 150 to 300 GHz using an ...
Show more >We report picosecond acoustic measurements in silica-glass films grown by wet thermal oxidation on a (111) silicon substrate. The longitudinal acoustic phonons are observed over the range from 150 to 300 GHz using an infrared pump and a second harmonic blue probe. The transducer is an aluminum thin film deposited on top. Multiple interference effects are analyzed and fully taken into account. They lead to a signal presenting rapid oscillations as a function of the sample thicknesses. The latter are determined by separate interferometry. Our remarkably precise acoustic attenuation results are found to follow rather well a model combining thermally activated relaxations and anharmonicity. New values for the optical absorption of silicon in the 400-to-500-nm region of the spectrum are obtained as a by-product.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL