Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces
A theory has been developed to interpret time-domain Brillouin scattering (TDBS) experiments involving coherent acoustic pulse (CAP) and light pulse beams propagating at an angle to each other. It predicts the influence of the directivity pattern of their acousto-optic interaction on TDBS signals wh...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-10-01
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| Series: | Photoacoustics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213597923001167 |
| _version_ | 1797643632756391936 |
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| author | Vitalyi E. Gusev Théo Thréard David H. Hurley Samuel Raetz |
| author_facet | Vitalyi E. Gusev Théo Thréard David H. Hurley Samuel Raetz |
| author_sort | Vitalyi E. Gusev |
| collection | DOAJ |
| description | A theory has been developed to interpret time-domain Brillouin scattering (TDBS) experiments involving coherent acoustic pulse (CAP) and light pulse beams propagating at an angle to each other. It predicts the influence of the directivity pattern of their acousto-optic interaction on TDBS signals when heterodyne detection of acoustically scattered light is in backward direction to incident light. The theory reveals relationships between the carrier frequency, amplitude and duration of acoustically induced ”wave packets” in light transient reflectivity signals, and factors such as CAP duration, widths of light and sound beams, and their interaction angle. It describes the transient dynamics of these wave packets when the light and CAP encounter material interfaces, and how the light scattering by the incident CAP transforms into scattering by the reflected and transmitted CAPs. The theory suggests that single-point TDBS experiments can determine not only depth positions of buried interfaces but also their local inclinations/orientations. |
| first_indexed | 2024-03-11T14:17:44Z |
| format | Article |
| id | doaj.art-e63600fa3cf74396ab00118dbf6d344b |
| institution | Directory Open Access Journal |
| issn | 2213-5979 |
| language | English |
| last_indexed | 2024-03-11T14:17:44Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Photoacoustics |
| spelling | doaj.art-e63600fa3cf74396ab00118dbf6d344b2023-11-01T04:47:12ZengElsevierPhotoacoustics2213-59792023-10-0133100563Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfacesVitalyi E. Gusev0Théo Thréard1David H. Hurley2Samuel Raetz3Laboratoire d’Acoustique de l’Université du Mans (LAUM), UMR 6613, Institut d’Acoustique – Graduate School (IA-GS), CNRS, Le Mans Université, FranceLaboratoire d’Acoustique de l’Université du Mans (LAUM), UMR 6613, Institut d’Acoustique – Graduate School (IA-GS), CNRS, Le Mans Université, FranceIdaho National Laboratory, P.O. Box 1625, Idaho Falls, 83415, ID, USALaboratoire d’Acoustique de l’Université du Mans (LAUM), UMR 6613, Institut d’Acoustique – Graduate School (IA-GS), CNRS, Le Mans Université, France; Corresponding author.A theory has been developed to interpret time-domain Brillouin scattering (TDBS) experiments involving coherent acoustic pulse (CAP) and light pulse beams propagating at an angle to each other. It predicts the influence of the directivity pattern of their acousto-optic interaction on TDBS signals when heterodyne detection of acoustically scattered light is in backward direction to incident light. The theory reveals relationships between the carrier frequency, amplitude and duration of acoustically induced ”wave packets” in light transient reflectivity signals, and factors such as CAP duration, widths of light and sound beams, and their interaction angle. It describes the transient dynamics of these wave packets when the light and CAP encounter material interfaces, and how the light scattering by the incident CAP transforms into scattering by the reflected and transmitted CAPs. The theory suggests that single-point TDBS experiments can determine not only depth positions of buried interfaces but also their local inclinations/orientations.http://www.sciencedirect.com/science/article/pii/S2213597923001167Picosecond laser ultrasonicsUltrafast photoacousticsTime-domain Brillouin scatteringNon-collinear interactionMaterial interface |
| spellingShingle | Vitalyi E. Gusev Théo Thréard David H. Hurley Samuel Raetz Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces Photoacoustics Picosecond laser ultrasonics Ultrafast photoacoustics Time-domain Brillouin scattering Non-collinear interaction Material interface |
| title | Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces |
| title_full | Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces |
| title_fullStr | Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces |
| title_full_unstemmed | Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces |
| title_short | Time-domain Brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto-optic interaction at material interfaces |
| title_sort | time domain brillouin scattering theory for probe light and acoustic beams propagating at an angle and acousto optic interaction at material interfaces |
| topic | Picosecond laser ultrasonics Ultrafast photoacoustics Time-domain Brillouin scattering Non-collinear interaction Material interface |
| url | http://www.sciencedirect.com/science/article/pii/S2213597923001167 |
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