منابع مشابه
Numerical Modelling of Optical Trapping
Optical trapping is a widely used technique, with many important applications in biology and metrology. Complete modelling of trapping requires calculation of optical forces, primarily a scattering problem, and nonoptical forces. The T-matrix method is used to calculate forces acting on spheroidal and cylindrical particles. Preprint of: T. A. Nieminen, H. Rubinsztein-Dunlop, N. R. Heckenberg an...
متن کاملThree-Dimensional Optical Trapping of a Plasmonic Nanoparticle using Low Numerical Aperture Optical Tweezers
It was previously believed that larger metal nanoparticles behave as tiny mirrors that are pushed by the light beam radiative force along the direction of beam propagation, without a chance to be confined. However, several groups have recently reported successful optical trapping of gold and silver particles as large as 250 nm. We offer a possible explanation based on the fact that metal nanopa...
متن کاملOptical Trapping
An optical trap or “optical tweezers” is a device which can apply and measure piconewton sized forces on micron sized dielectric objects under a microscope using a highly focused light beam. It allows very detailed manipulations and measurements of several interesting systems in the fields of molecular and cell biology and thus acts as a major tool in biophysics. They are used in biological exp...
متن کاملOptical trapping of nanoparticles.
Optical trapping is a technique for immobilizing and manipulating small objects in a gentle way using light, and it has been widely applied in trapping and manipulating small biological particles. Ashkin and co-workers first demonstrated optical tweezers using a single focused beam. The single beam trap can be described accurately using the perturbative gradient force formulation in the case of...
متن کاملHolographic optical trapping.
Holographic optical tweezers use computer-generated holograms to create arbitrary three-dimensional configurations of single-beam optical traps that are useful for capturing, moving, and transforming mesoscopic objects. Through a combination of beam-splitting, mode-forming, and adaptive wavefront correction, holographic traps can exert precisely specified and characterized forces and torques on...
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ژورنال
عنوان ژورنال: Computer Physics Communications
سال: 2001
ISSN: 0010-4655
DOI: 10.1016/s0010-4655(01)00391-5