Interference patterns produced by an evaporating droplet on a horizontal surface
| Autor: | Danh Bich Do, Quang Truong Pham, Gia Long Ngo, Ngoc Diep Lai |
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| Přispěvatelé: | Laboratoire Lumière, Matière et Interfaces (LuMIn), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Surface (mathematics) [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Plane (geometry) business.industry General Physics and Astronomy Concentric Interference (wave propagation) Curvature 01 natural sciences Collimated light 010305 fluids & plasmas Optics [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] 0103 physical sciences Sensitivity (control systems) 010306 general physics business Nanoscopic scale ComputingMilieux_MISCELLANEOUS |
| Zdroj: | American Journal of Physics American Journal of Physics, American Association of Physics Teachers, 2021, 89 (9), pp.862-868. ⟨10.1119/10.0004958⟩ |
| ISSN: | 0002-9505 |
| DOI: | 10.1119/10.0004958⟩ |
| Popis: | We study dynamical Newton-ring like fringes created by interfering Fresnel reflections of an evaporating sessile liquid droplet, which acts as a miniature convex lens. We show that conventional thin-film interference theory cannot be applied to explain the physical phenomenon. Because of the large thickness and curvature of the liquid droplet, the geometrical light paths of the reflected beams become very complicated and can no longer be considered approximately collimated. This results in interference fringes of concentric circles with different directional motion depending on the observation plane. The change in the interference pattern as a function of time is demonstrated by both simulation and experiment. This investigation allows us to fully understand the formation of interference patterns of an optical system having arbitrary thickness and curvature. In addition, by analyzing the high-contrast dynamic rings, we demonstrate nanoscale sensitivity to surface height changes of an evaporating water drop. |
| Databáze: | OpenAIRE |
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