Zhikun Yang, Xinglei Lin, He Zhang, Yingtian Xu, Liang Jin, Yonggang Zou, Xiaohui Ma
A special bottle beam was obtained by shaping the elliptical Gaussian beam through an axicon optical system. When elliptical Gaussian beams have a different eccentricity (σ = 0, 0.3, 0.6, 0.9), the optical field distribution after axicon and the focusing lens was investigated. By comparison with a circular Gaussian beam, this asymmetry leads to the formation of a non-diffracting beam from a quasi-Bessel beam characteristic to a quasi-Mathieu beam characteristic after the incident axicon. At the same time, the bottle beams produced by the asymmetric light source incident on the axicon-lens system showed changes in the front and rear sides. In addition, the variation of the diffraction spot in the optical space region on the bottle beam axis was also analyzed. On this basis, a hollow light spot tweezer with “quasi-Pearcey beam handle” was obtained, which is expected to expand the application of particle trapping operation.
DOI
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