Optical tweezers have found widespread application in many fields, from physics to biology.
Here, we explain in detail how optical forces and torques can be described within the
geometrical optics approximation, and we show that this approximation provides reliable
results in agreement with experiments for particles whose characteristic dimensions are
larger than the wavelength of the trapping light. Furthermore, we provide an object-oriented
software package implemented in MATLAB for the calculation of optical forces and torques …

… Abstract: We provide a toolbox for the calculation of optical forces and torques on dielectric
particles in the geometrical optics limit. … Here, we present an object-oriented software package
implemented in MatLab® for the calculation of optical forces and torques in the geometrical
optics regime: OTGO – Optical Tweezers in Geometrical Optics [21]. We will show how we
used the package to reproduce various experiments – eg, standard optical tweezers, optical
tweezers with elongated particle (see Fig. 1), windmill effect, Kramers transitions between two …