dorsal/arxiv
View SchemaMeasurement of refractive index of single microparticles
| Authors | Gregor Knoener, Simon Parkin, Timo A. Nieminen, Norman R. Heckenberg, Halina Rubinsztein-Dunlop |
|---|---|
| Categories | |
| ArXiv ID | physics/0610087 |
| URL | https://arxiv.org/abs/physics/0610087 |
| DOI | 10.1103/PhysRevLett.97.157402 |
| Journal | Physical Review Letters 97(15), 157402 (2006) |
Abstract
The refractive index of single microparticles is derived from precise measurement and rigorous modeling of the stiffness of a laser trap. We demonstrate the method for particles of four different materials with diameters from 1.6 to 5.2 microns and achieve an accuracy of better than 1%. The method greatly contributes as a new characterization technique because it works best under conditions (small particle size, polydispersion) where other methods, such as absorption spectroscopy, start to fail. Particles need not be transferred to a particular fluid, which prevents particle degradation or alteration common in index matching techniques. Our results also show that advanced modeling of laser traps accurately reproduces experimental reality.
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"abstract": "The refractive index of single microparticles is derived from precise\nmeasurement and rigorous modeling of the stiffness of a laser trap. We\ndemonstrate the method for particles of four different materials with diameters\nfrom 1.6 to 5.2 microns and achieve an accuracy of better than 1%. The method\ngreatly contributes as a new characterization technique because it works best\nunder conditions (small particle size, polydispersion) where other methods,\nsuch as absorption spectroscopy, start to fail. Particles need not be\ntransferred to a particular fluid, which prevents particle degradation or\nalteration common in index matching techniques. Our results also show that\nadvanced modeling of laser traps accurately reproduces experimental reality.",
"arxiv_id": "physics/0610087",
"authors": [
"Gregor Knoener",
"Simon Parkin",
"Timo A. Nieminen",
"Norman R. Heckenberg",
"Halina Rubinsztein-Dunlop"
],
"categories": [
"physics.optics"
],
"doi": "10.1103/PhysRevLett.97.157402",
"journal_ref": "Physical Review Letters 97(15), 157402 (2006)",
"title": "Measurement of refractive index of single microparticles",
"url": "https://arxiv.org/abs/physics/0610087"
},
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