Abstract

A pair of stable noncanonical scalar vortices of the same charge is generated experimentally across the cross section of an optical beam using a computer-generated hologram with higher-order fractional screw dislocation. The noncanonical nature of the generated vortices is identified by the gradient of the phase around each vortex and also the crossing angle between the zero contours of the real and imaginary parts of the optical field. The anisotropy of the vortices is controlled by the fractional order of the computer-generated hologram. The behavior of the rate of change of phase around each individual vortex is found to be different from that of the earlier reports on noncanonical vortices. The observed experimental results are qualitatively explained based on the effect of nonlocalized phases of the generated vortices. The generated beams with a nested pair of noncanonical vortices can be of importance in accelerated rotation of the beams and in optical micromanipulation.

© 2017 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Dynamic evolution of circular edge dislocations in free space and atmospheric turbulence

Jinhong Li, Penghui Gao, Ke Cheng, and Meiling Duan
Opt. Express 25(3) 2895-2908 (2017)

Propagation dynamics of optical vortices with anisotropic phase profiles

Guang-Hoon Kim, Hae June Lee, Jong-Uk Kim, and Hyyong Suk
J. Opt. Soc. Am. B 20(2) 351-359 (2003)

Versatile generation of optical vortices based on paraxial mode expansion

Yutaka Yoshikawa and Hiroyuki Sasada
J. Opt. Soc. Am. A 19(10) 2127-2133 (2002)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription