Stability and instability for low refractive-index-contrast particle trapping in a dual-beam optical trap
| Autor: | Alison Huff, Linda S. Hirst, Jay E. Sharping, Charles Melton |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Range (particle radiation)
Optical fiber Materials science Scattering business.industry (060.2310) Fiber optics Optical Physics Materials Engineering Instability Molecular physics Article Atomic and Molecular Physics and Optics law.invention Optics Optical tweezers law Refractive index contrast Particle Particle size business (140.7010) Laser trapping Biotechnology |
| Zdroj: | Huff, A; Melton, CN; Hirst, LS; & Sharping, JE. (2015). Stability and instability for low refractive-index-contrast particle trapping in a dual-beam optical trap. Biomedical Optics Express, 6(10), 3812-3819. doi: 10.1364/BOE.6.003812. UC Merced: Retrieved from: http://www.escholarship.org/uc/item/198325ks Biomedical optics express, vol 6, iss 10 |
| Popis: | © 2015 Optical Society of America. A dual-beam optical trap is used to trap and manipulate dielectric particles. When the refractive index of these particles is comparable to that of the surrounding medium, equilibrium trapping locations within the system shift from stable to unstable depending on fiber separation and particle size. This is due to to the relationship between gradient and scattering forces. We experimentally and computationally study the transitions between stable and unstable trapping of poly(methyl methacrylate) beads for a range of parameters relevant to experimental setups involving giant unilamellar vesicles. We present stability maps for various fiber separations and particle sizes, and find that careful attention to particle size and configuration is necessary to obtain reproducible quantitative results for soft matter stretching experiments. |
| Databáze: | OpenAIRE |
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