 | Control and Modeling of Optical Trapping Forces. To exactly determine the optical forces due to a tightly focused electromagnetic beam, we use the Generalized Lorenz-Mie Theory, thus accounting for microsphere of any size with respect to the employed wavelength. The incident beam is described by angular spectrum representation, an approach also known as vectorial Debye diffraction theory. In this way we are able to determine the exact analytical optical force profile for an arbitrary position and beam. Read More |  |  | Optical Micromanipulation. Optical trapping, also known as optical tweezers, is mainly used in the biophysical field for precise mechanical force measurements. In our group we have a twin optical tweezers setup (inverted configuration) relying on a fs Ti:Sapphire trapping laser. Ongoing research is focused on the study of bilipidic membrane structural properties, single nanofiber elasticity, and efficient optical tweezers trapping. Read more |
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