title: Measurement of elastic light scattering from two optically trapped microspheres and red blood cells in a transparent medium.
abstract: Optical tweezers can be used to manipulate small objects and cells. A trap can be used to fix the position of a particle during light scattering measurements. The places of two separately trapped particles can also be changed. In this Letter we present elastic light scattering measurements as a function of scattering angle when two trapped spheres are illuminated with a He-Ne laser. This setup is suitable for trapping noncharged homogeneous spheres. We also demonstrate measurement of light scattering patterns from two separately trapped red blood cells. Two different illumination schemes are used for both samples.
authors.affiliation: Optoelectronics and Measurement Techniques Laboratory, University of Oulu, Oulu, Finland. matti.kinnunen@ee.oulu.fi
authors.forename: Matti
authors.initials: M
authors.lastname: Kinnunen
authors.forename: Antti
authors.initials: A
authors.lastname: Kauppila
authors.forename: Artashes
authors.initials: A
authors.lastname: Karmenyan
authors.forename: Risto
authors.initials: R
authors.lastname: Myllylä
mesh_terms: D004548:Elasticity; D004912:Erythrocytes; D006801:Humans; D007834:Lasers; D008027:Light; D008863:Microspheres; D052898:Optical Tweezers; D011137:Polystyrenes / Q000737:chemistry; D012542:Scattering, Radiation
chemical_list: D011137:Polystyrenes