[21p-P01-1~11] 3.1 Basic optics and frontier of optics (merged with formerly 3.2 Equipment optics and materials)

[21p-P01-8] Optical vortex tweezers using nano-structures

〇(M1)Maho Nishiguchi¹, Ken-ichi Yuyama¹, Yasuyuki Tsuboi¹ (1.Osaka Metropolitan Univ.)

Keywords:black-silicon, optical tweezer, gaussian beam

Optical tweezers are a technique for trapping and manipulation of nano/micromaterials and Gaussian beam has been used in a trapping laser. This has no orbital angular momentum, while optical vortex has a spiral wavefront generating an angular momentum. Conventional optical tweezers have three degrees of freedom: wavelength, laser intensity and beam profile. Using optical vortex, a new degree of freedom (orbital angular momentum) can be introduced. We performed optical trapping of polystyrene particles on nano-structures using optical vortex and followed the trapping behavior by microfluorescence observation.