The theory of photokinetic effects expresses the forces and torques exerted by a beam of light in terms of experimentally accessible amplitude and phase profiles. We use this formalism to develop an ...

When studying biological cells using optical tweezers, one main issue is the damage caused to the cell by the tool. Giovanni Volpe, University of Gothenburg, has discovered a new type of force that ...

(Nanowerk Spotlight) Colloidal particles are promising building blocks to construct functional nanostructures, materials and devices. Researchers have developed numerous optical techniques, including ...

A method of optically selecting and sorting nanoparticles according to their quantum mechanical properties has been developed by researchers in Japan. The method could prove a crucial tool for makers ...

Microscopic objects may also be moved using this phenomenon. In this field, they are viewed as tweezers that operate in much the same way the conventional macroscopic variety. Bioscientists can use ...