TITLE

Tunable Fresnel lens using nanoscale polymer-dispersed liquid crystals

AUTHOR(S)
Hongwen Ren, P. T.; Yun-Hsing Fan, P. T.; Shin-Tson Wu
PUB. DATE
August 2003
SOURCE
Applied Physics Letters;8/25/2003, Vol. 83 Issue 8, p1515
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An electrically tunable Fresnel zone plate lens is demonstrated using nanoscale polymer-dispersed liquid crystal droplets. In the voltage-off state, the zone plate behaves like a positive lens. The measured diffraction efficiency is close to the theoretical limit and is controllable by voltage. The major advantages of such a Fresnel lens are simple fabrication, large aperture size, polarization independent, and fast switching speed, although the required operating voltage is relatively high. © 2003 American Institute of Physics.
ACCESSION #
10603853

 

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