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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 18,
  • Issue 8,
  • pp. 080008-
  • (2020)

Circular Airy beams realized via the photopatterning of liquid crystals [Invited]

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Abstract

The generation of an autofocusing circular Airy beam (CAB) is realized via a liquid crystal (LC) geometric phase plate with a simple configuration. The fabrication of the LC plate is based on the photoalignment technology and dynamic exposure skill. A focal length of 74 cm is obtained, and the propagation dynamics are consistent with the simulations. Besides, a defocusing CAB is also generated, and the switch between the autofocusing and defocusing CABs can be achieved by controlling the input polarization state. This work provides a convenient and flexible approach to acquire CABs, which will promote the CAB-related applications and researches.

© 2020 Chinese Laser Press

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