Acoustic waves undetectable by transient reflectivity measurements
| Type of Publication: | Journal article |
| Publication status: | Published |
| Author: | He, Chuan; Ristow, Oliver; Grossmann, Martin; Brick, Delia; Guo, Yuning; Schubert, Martin; Hettich, Mike; Gusev, Vitalyi; Dekorsy, Thomas |
| Year of publication: | 2017 |
| Published in: | Physical Review B ; 95 (2017), 18. - 184302. - ISSN 2469-9950. - eISSN 2469-9969 |
| DOI (citable link): | https://dx.doi.org/10.1103/PhysRevB.95.184302 |
| Summary: |
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.
|
| Subject (DDC): | 530 Physics |
| Bibliography of Konstanz: | Yes |
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HE, Chuan, Oliver RISTOW, Martin GROSSMANN, Delia BRICK, Yuning GUO, Martin SCHUBERT, Mike HETTICH, Vitalyi GUSEV, Thomas DEKORSY, 2017. Acoustic waves undetectable by transient reflectivity measurements. In: Physical Review B. 95(18), 184302. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.95.184302
@article{He2017-05-11Acous-39415, title={Acoustic waves undetectable by transient reflectivity measurements}, year={2017}, doi={10.1103/PhysRevB.95.184302}, number={18}, volume={95}, issn={2469-9950}, journal={Physical Review B}, author={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}, note={Article Number: 184302} }
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