Abstract
Based on a nanoimprint technique, a new method is proposed for the rapid fabrication of an electrically switchable liquid crystal Fresnel zone lens (SLCFZL). The flow chart of the proposed fabrication method for a SLCFZL is given and a binary SLCFZL is experimentally demonstrated using the proposed method. The diffraction efficiency of the SLCFZL is continuously tunable through an external electric field, and the driving voltage is relatively low (). The measured maximal diffraction efficiency reaches for a linearly polarized light, which is close to the theoretical value of 40.5%. The focusing and imaging properties of the SLCFZL are also experimentally tested.
© 2010 Optical Society of America
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