Femtosecond ultrasonic spectroscopy using a piezoelectric nanolayer

Hypersound attenuation in vitreous silica films

Yu Chieh Wen, Shi Hao Guol, Hung Pin Chen, Jinn-Kong Sheu, Chi Kuang Sun

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We report ultra-broadband ultrasonic spectroscopy with an impedance-matched piezoelectric nanolayer, which enables optical generation and detection of a 730-fs acoustic pulse (the width of ten lattice constants). The bandwidth improvement facilitates THz laser ultrasonics to bridge the spectral gap between inelastic light and x-ray scatterings (0.1-1 THz) in the studies of lattice dynamics. As a demonstration, this method is applied to measure sound attenuation in a vitreous SiO2 thin film. Our results extend the existing low-frequency data obtained by ultrasonic-based and light scattering methods and also show a f2 behavior for frequencies f up to 650 GHz.

Original languageEnglish
Article number051913
JournalApplied Physics Letters
Volume99
Issue number5
DOIs
Publication statusPublished - 2011 Aug 1

Fingerprint

ultrasonic spectroscopy
ultrasonics
attenuation
silicon dioxide
acoustics
x ray scattering
light scattering
impedance
low frequencies
broadband
bandwidth
thin films
pulses
scattering
lasers

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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Femtosecond ultrasonic spectroscopy using a piezoelectric nanolayer : Hypersound attenuation in vitreous silica films. / Wen, Yu Chieh; Guol, Shi Hao; Chen, Hung Pin; Sheu, Jinn-Kong; Sun, Chi Kuang.

In: Applied Physics Letters, Vol. 99, No. 5, 051913, 01.08.2011.

Research output: Contribution to journalArticle

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AU - Wen, Yu Chieh

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AU - Sun, Chi Kuang

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