Establishment of an optical trapping curve for prediction of trapping parameters

•Present research work focused on the establishment of a prediction curve in optical trapping.•TEM00-gaussian light beam is considered to study the optical trapping. Here, the particle trapping is done under a highly laminar domain applicable to MEMS, lab-on-chip, microbiology.•A mathematical expression for optical trapping condition is developed which says maximum active gradient force Fgrad, max is higher than viscous drag forces, Fvisc that is FviscFgrad, max Fvisc, ( Fgrad, max is a maximum value of Fgrad). In this paper, a graphical approach is applied to predetermine the value of specific parameter such as relative velocity of particle and light wavelength under the necessary condition for optical trapping, while keeping other parameters are as fixed. Software simulation is performed with set of relative velocities on polystyrene small-sized particle in water channel to validate the graphical approach.