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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.

Phonon spectroscopy with chirped shear and compressive acoustic pulses Thumbnail


Authors

Caroline Louise Poyser

W.B. York

D. Srikanthreddy

B.A. Glavin

T.L. Linnik

ANDREY AKIMOV ANDREY.AKIMOV@NOTTINGHAM.AC.UK
Principal Research Fellow

ANTHONY KENT anthony.kent@nottingham.ac.uk
Professor of Physics



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.

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, Article 255502. https://doi.org/10.1103/PhysRevLett.119.255502

Journal Article Type Article
Acceptance Date Nov 7, 2017
Online Publication Date Dec 22, 2017
Deposit Date Nov 17, 2017
Publicly Available Date Dec 22, 2017
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
DOI https://doi.org/10.1103/PhysRevLett.119.255502
Public URL https://nottingham-repository.worktribe.com/output/901371
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.255502
Contract Date Nov 17, 2017

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