title: Optical tweezers with multiple optical forces using double-hologram interference.
abstract: In earlier work, we introduced new ways of generating a series of interference patterns formed from Laguerre-Gaussian (LG) beams, which are being used as advanced optical tweezers in creating and manipulating three-dimensional structures. In this work, we have succeeded in demonstrating, for the first time to our knowledge, double LG and LG beams with a Gaussian-beam interference using a Michelson interferometer. We have been able to observe LG interference of unequal azimuthal charge by using just two holograms. This is a new type of optical tweezers because the tweezers have the ability to transfer orbital angular momentum, spin angular momentum, and optical gradient force simultaneously to microparticles. This provides a great opportunity for investigating the force interaction within a single laser beam.
authors.forename: Woei Ming
authors.initials: WM
authors.lastname: Lee
authors.forename: X
authors.initials: X
authors.lastname: Yuan
authors.forename: D
authors.initials: D
authors.lastname: Tang