Electrically tunable photo-aligned two-dimensional liquid crystal polarisation grating

ABSTRACT

Two-dimensional liquid crystal polarisation grating based on twist liquid crystal has been demonstrated and fabricated by polarisation holography in this paper. The maximal diffraction efficiency of the second order is up to 90%. And the two-dimensional liquid crystal polarisation grating has the properties of electrically tenability and polarisation tenability. The two-dimensional polarisation grating diffracts light into a spot array. Different direction diffraction light is with different polarisation states. The intensity of the different orders diffraction light is optically controlled.

Graphical Abstract

KEYWORDS:

• Polarisation grating
• multi-beams
• liquid crystals
• electrically tunable

Acknowledgments

The authors are indebted to Rolic Company for their kind support with the photo-alignment material. This work was sponsored by the National Science Foundation of China  (11604327, 61377032, 61378057, 61405194 and 61475152).

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was sponsored by the National Science Foundation of China  (11604327, 61377032, 61378057, 61405194 and 61475152).