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Acoustic waves undetectable by transient reflectivity measurements

He, Chuan and Ristow, Oliver and Grossmann, Martin and Brick, Delia and Guo, Yuning and Schubert, Martin and Hettich, Mike and Gusev, Vitalyi and Dekorsy, Thomas (2017) Acoustic waves undetectable by transient reflectivity measurements. Physical Review B, 95 (18), p. 184302. American Physical Society. DOI: 10.1103/PhysRevB.95.184302 ISSN 1098-0121

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1103/PhysRevB.95.184302

Abstract

A free-standing GaAs membrane is investigated by pump-probe reflectivity measurements with femtosecond laser pulses of 400-nm wavelength. It is found that the detected wide spectrum of laser-generated coherent strain waves in the membrane does not contain a specific hypersonic frequency. Theoretical analysis reveals that this effect is related to zero sensitivity of the acousto-optic detection at a particular frequency defined by the wavelength of the probe laser pulse on the mechanical free surface of the GaAs membrane. We predict that a similar behavior is expected in Si and Au membranes and films, indicating that the presence of zeros in the spectral transformation function of acousto-optic conversion is a rather general phenomenon in picosecond ultrasonics that has so far been neglected.

Item URL in elib:https://elib.dlr.de/112499/
Document Type:Article
Title:Acoustic waves undetectable by transient reflectivity measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
He, ChuanUNSPECIFIEDUNSPECIFIED
Ristow, OliverUNSPECIFIEDUNSPECIFIED
Grossmann, MartinUNSPECIFIEDUNSPECIFIED
Brick, DeliaUNSPECIFIEDUNSPECIFIED
Guo, YuningUNSPECIFIEDUNSPECIFIED
Schubert, MartinUNSPECIFIEDUNSPECIFIED
Hettich, MikeUNSPECIFIEDUNSPECIFIED
Gusev, VitalyiUNSPECIFIEDUNSPECIFIED
Dekorsy, Thomasinstitute of technical physics, dlrhttps://orcid.org/0000-0003-2257-2854
Date:11 May 2017
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:95
DOI :10.1103/PhysRevB.95.184302
Page Range:p. 184302
Publisher:American Physical Society
ISSN:1098-0121
Status:Published
Keywords:picosceond ultrasonics, non-destructive testing, acoustic Phonons, membranes
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Laser Research and Technology
Location: Stuttgart
Institutes and Institutions:Institute of Technical Physics
Deposited By: Dekorsy, Prof. Dr. Thomas
Deposited On:12 Jun 2017 08:46
Last Modified:06 Sep 2019 15:29

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