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Phonon spectroscopy with chirped shear and compressive acoustic pulses

Poyser, Caroline Louise; York, W.B.; Srikanthreddy, D.; Glavin, B.A.; Linnik, T.L.; Campion, R.P.; Akimov, A.V.; Kent, A.J.

Authors

Caroline Louise Poyser

W.B. York

D. Srikanthreddy

B.A. Glavin

T.L. Linnik

R.P. Campion

A.V. Akimov

A.J. Kent



Abstract

Picosecond duration compressive and shear phonon wave packets injected into (311) GaAs slabs transform after propagation through ∼1  mm into chirped acoustic pulses with a frequency increasing in time due to phonon dispersion. By probing the temporal optical response to coherent phonons in a near surface layer of the GaAs slab, we show that phonon chirping opens a transformational route for high-sensitivity terahertz and subterahertz phonon spectroscopy. Temporal gating of the chirped phonon pulse allows the selection of a narrow band phonon spectrum with a central frequency up to 0.4 THz for longitudinal and 0.2 THz for transverse phonons.

Journal Article Type Article
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 119
Article Number 255502
APA6 Citation Poyser, C. L., York, W., Srikanthreddy, D., Glavin, B., Linnik, T., Campion, R., …Kent, A. (in press). Phonon spectroscopy with chirped shear and compressive acoustic pulses. Physical Review Letters, 119, https://doi.org/10.1103/PhysRevLett.119.255502
DOI https://doi.org/10.1103/PhysRevLett.119.255502
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.255502
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

Files

PhysRevLett.119.255502.pdf (690 Kb)
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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