Optical lever for broadband detection of fluid interface fluctuations
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866911324683894784 |
|---|---|
| author | Ajithkumar, Sreelekshmi C. Barroso, Vitor S. Švančara, Patrik Kent, Anthony J. Weinfurtner, Silke |
| author_facet | Ajithkumar, Sreelekshmi C. Barroso, Vitor S. Švančara, Patrik Kent, Anthony J. Weinfurtner, Silke |
| contents | We exploit the optical lever principle to detect minute fluctuations of a liquid-air interface. Waves propagating on the interface deflect a specularly reflected laser beam, inducing angular deviations captured by a dual-element photodiode. We implement this principle in a compact set-up that includes a temperature-controlled fluid sample. This allows us to detect deflection angle fluctuations across five orders of magnitude in frequency, from individual low-frequency surface eigenmodes to the thermal distribution of high-frequency capillary waves. In addition to demonstrating the method's versatility and broad dynamical range, we highlight practical considerations in characterising liquid interface dynamics, bridging established optical methods with their application to fluid and soft-matter systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_05275 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optical lever for broadband detection of fluid interface fluctuations Ajithkumar, Sreelekshmi C. Barroso, Vitor S. Švančara, Patrik Kent, Anthony J. Weinfurtner, Silke Optics We exploit the optical lever principle to detect minute fluctuations of a liquid-air interface. Waves propagating on the interface deflect a specularly reflected laser beam, inducing angular deviations captured by a dual-element photodiode. We implement this principle in a compact set-up that includes a temperature-controlled fluid sample. This allows us to detect deflection angle fluctuations across five orders of magnitude in frequency, from individual low-frequency surface eigenmodes to the thermal distribution of high-frequency capillary waves. In addition to demonstrating the method's versatility and broad dynamical range, we highlight practical considerations in characterising liquid interface dynamics, bridging established optical methods with their application to fluid and soft-matter systems. |
| title | Optical lever for broadband detection of fluid interface fluctuations |
| topic | Optics |
| url | https://arxiv.org/abs/2506.05275 |