Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides
We utilized transmission-type pump–probe technique to investigate coherent acoustic phonons in the superlattices of perovskite oxides such as SrIrO _3 /SrTiO _3 and SrRuO _3 /SrTiO _3 . Because the films in the superlattices are of high-quality and their thicknesses are only several monolayers, quas...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/abf86e |
| _version_ | 1827872792158142464 |
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| author | Chi-Yuan Yang Ping-Chun Wu Ying-Hao Chu Kung-Hsuan Lin |
| author_facet | Chi-Yuan Yang Ping-Chun Wu Ying-Hao Chu Kung-Hsuan Lin |
| author_sort | Chi-Yuan Yang |
| collection | DOAJ |
| description | We utilized transmission-type pump–probe technique to investigate coherent acoustic phonons in the superlattices of perovskite oxides such as SrIrO _3 /SrTiO _3 and SrRuO _3 /SrTiO _3 . Because the films in the superlattices are of high-quality and their thicknesses are only several monolayers, quasi-monochromatic acoustic phonons with THz frequency have been achieved. By investigating the propagation of coherent acoustic phonons in the superlattices with different epitaxial periods, the phonon mean free paths of SrTiO _3 were studied in the frequency range between 0.5 THz and 1 THz. We further demonstrated coherent control to amplify or cease the THz coherent acoustic phonon oscillations in the superlattices. By controlling the delay of two pulses for shining the superlattices, the amplitude and phase of the THz coherent acoustic phonons were manipulated. According to the measurements of time-domain Brillouin scatterings, we found the optoacoustic conversion efficiency of SrIrO _3 outperforms that of SrRuO _3 for generating acoustic phonons. |
| first_indexed | 2024-03-12T16:29:54Z |
| format | Article |
| id | doaj.art-df9e214e4aa143c68d3611d72aa009ba |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:29:54Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
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| series | New Journal of Physics |
| spelling | doaj.art-df9e214e4aa143c68d3611d72aa009ba2023-08-08T15:35:19ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123505300910.1088/1367-2630/abf86eGeneration and coherent control of terahertz acoustic phonons in superlattices of perovskite oxidesChi-Yuan Yang0Ping-Chun Wu1Ying-Hao Chu2Kung-Hsuan Lin3https://orcid.org/0000-0003-2731-5400Institute of Physics , Academia Sinica, Taipei 11529, TaiwanDepartment of Materials Science and Engineering, National Chiao Tung University , Hsinchu 30010, Taiwan; Department of Physics, National Cheng Kung University , Tainan 70101, TaiwanDepartment of Materials Science and Engineering, National Chiao Tung University , Hsinchu 30010, TaiwanInstitute of Physics , Academia Sinica, Taipei 11529, TaiwanWe utilized transmission-type pump–probe technique to investigate coherent acoustic phonons in the superlattices of perovskite oxides such as SrIrO _3 /SrTiO _3 and SrRuO _3 /SrTiO _3 . Because the films in the superlattices are of high-quality and their thicknesses are only several monolayers, quasi-monochromatic acoustic phonons with THz frequency have been achieved. By investigating the propagation of coherent acoustic phonons in the superlattices with different epitaxial periods, the phonon mean free paths of SrTiO _3 were studied in the frequency range between 0.5 THz and 1 THz. We further demonstrated coherent control to amplify or cease the THz coherent acoustic phonon oscillations in the superlattices. By controlling the delay of two pulses for shining the superlattices, the amplitude and phase of the THz coherent acoustic phonons were manipulated. According to the measurements of time-domain Brillouin scatterings, we found the optoacoustic conversion efficiency of SrIrO _3 outperforms that of SrRuO _3 for generating acoustic phonons.https://doi.org/10.1088/1367-2630/abf86epicosecond ultrasonicscoherent acoustic phononsperovskite oxidespump–probeSTO |
| spellingShingle | Chi-Yuan Yang Ping-Chun Wu Ying-Hao Chu Kung-Hsuan Lin Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides New Journal of Physics picosecond ultrasonics coherent acoustic phonons perovskite oxides pump–probe STO |
| title | Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides |
| title_full | Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides |
| title_fullStr | Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides |
| title_full_unstemmed | Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides |
| title_short | Generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides |
| title_sort | generation and coherent control of terahertz acoustic phonons in superlattices of perovskite oxides |
| topic | picosecond ultrasonics coherent acoustic phonons perovskite oxides pump–probe STO |
| url | https://doi.org/10.1088/1367-2630/abf86e |
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