title: Controllable light capsules employing modified Bessel-Gauss beams.
abstract: We report, in theory and experiment, on a novel class of controlled light capsules with nearly perfect darkness, directly employing intrinsic properties of modified Bessel-Gauss beams. These beams are able to naturally create three-dimensional bottle-shaped region during propagation as long as the parameters are properly chosen. Remarkably, the optical bottle can be controlled to demonstrate various geometries through tuning the beam parameters, thereby leading to an adjustable light capsule. We provide a detailed insight into the theoretical origin and characteristics of the light capsule derived from modified Bessel-Gauss beams. Moreover, a binary digital micromirror device (DMD) based scheme is first employed to shape the bottle beams by precise amplitude and phase manipulation. Further, we demonstrate their ability for optical trapping of core-shell magnetic microparticles, which play a particular role in biomedical research, with holographic optical tweezers. Therefore, our observations provide a new route for generating and controlling bottle beams and will widen the potentials for micromanipulation of absorbing particles, aerosols or even individual atoms.
authors.affiliation: Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Gong
authors.affiliation: Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: National Center for Protein Sciences Shanghai, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, CAS, Shanghai, 201210, China.
authors.forename: Yuxuan
authors.initials: Y
authors.lastname: Ren
authors.affiliation: Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
authors.forename: Xingze
authors.initials: X
authors.lastname: Qiu
authors.affiliation: Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
authors.forename: Mincheng
authors.initials: M
authors.lastname: Zhong
authors.affiliation: Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, 230026, China.
authors.forename: Yinmei
authors.initials: Y
authors.lastname: Li