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Optica, Applied Optics, 10(53), p. 2026, 2014

DOI: 10.1364/ao.53.002026

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Liquid crystal Fresnel zone lens based on single-side-patterned photoalignment layer

Journal article published in 2014 by X. Q. Wang, F. Fan, T. Du, A. M. W. Tam, Y. Ma, A. K. Srivastava, V. G. Chigrinov, H. S. Kwok
This paper is available in a repository.
This paper is available in a repository.

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Abstract

In this article, we disclose a method to fabricate a liquid crystal (LC) Fresnel zone lens (FZL) with high efficiency. The LCFZL, based on patterned planar-aligned regions, has been prepared by means of a two-step photoalignment technique. The proposed binary-phase LCFZL manifests 39% diffraction efficiency at the focal point, which is close to the theoretical limit, 41%. Moreover, because of a lower driving voltage and faster response time, these elements could find application in many modern devices.