Abstract

We report on the experimental realization of flat mirrors enabling the broadband generation of optical vortices upon reflection. The effect is based on the geometric Berry phase associated with the circular Bragg reflection phenomenon from chiral uniaxial media. We show the reflective optical vortex generation from both diffractive and nondiffractive paraxial light beams using spatially patterned chiral liquid crystal films. The intrinsic spectrally broadband character of spin-orbit generation of optical phase singularities is demonstrated over the full visible domain. Our results do not rely on any birefringent retardation requirement and, consequently, foster the development of a novel generation of robust optical elements for spin-orbit photonic technologies.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Bragg reflective polychromatic vector beam generation from opposite-handed cholesteric liquid crystals

Tiegang Lin, Yide Yuan, Yaqin Zhou, Wenxing Fu, Huihui Huang, Lishuang Yao, Fan Fan, and Shuangchun Wen
Opt. Lett. 44(11) 2720-2723 (2019)

Laguerre–Gaussian modal q-plates

Mushegh Rafayelyan and Etienne Brasselet
Opt. Lett. 42(10) 1966-1969 (2017)

Broadband and high-efficiency vortex beam generator based on a hybrid helix array

Chaoqun Fang, Chao Wu, Zhijie Gong, Song Zhao, Anqi Sun, Zeyong Wei, and Hongqiang Li
Opt. Lett. 43(7) 1538-1541 (2018)

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 (6)

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

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