Browsing by Author "Md. Tarikul Islam"

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    Near Field Optical Pulling Force on Plasmonic and Dielectric Nanoparticles Between Two Glass Substrates Using Plane Wave
    (North South University, 2020) Md. Tarikul Islam; Mashiyat Khan; Mahdy Rahman Chowdhury; 1621448043; 1621327043
    Optical pulling is getting huge attention in the optical manipulation field for its unique applications. Many tried to give their contribution to getting a good OPF over different particles. This technique is very popular from kid to scientist as an image of taking things into the spaceship using light comes to mind whenever we heard about OPF or tractor beam. We showed a tremendous way to get OPF in this report named, “Near Field Optical Pulling Force on Plasmonic and Dielectric Nanoparticles Between Two Glass Substrates Using Plane Wave” where we used two glass substrates in the homogeneous medium. We used COMSOL MULTIPHYSICS to calculate all the data and investigate different physics like electric field distribution, current density, arrow line, pointing vector, etc. We used two features of COMSOL MULTIPHYSIC named Multislice and Arrowline to investigate the physics working behind our research. We take an Airbox as the background medium and set all the necessary boundary conditions in the outer surface of the airbox. Inside the Airbox, two glass substrates have been placed and nanoparticles are put into them to find out the light-matter interaction. We projected a plane wave from the X direction where the electric polarization is set along the Y direction and magnetic polarization in the Z direction. In our setup, we used varying lambda ( ) as parametric sweep. Physics-defined mesh has been used and a slightly larger surface has been used for surface integration to calculate the force along every direction. We used gold and silver as plasmonic nanoparticles and silicon dioxide as dielectric nanoparticles in our experiment. We use two different sizes for investigation and come out with a good result. In short, our work is to see the light-matter interaction for the plan wave and how the interaction changes concerning the wavelength of the light.