Tunable Fresnel lens using nanoscale polymer-dispersed liquid crystals | Zendy

Hongwen Ren | Zendy; YunHsing Fan | Zendy; ShinTson Wu | Zendy

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Tunable Fresnel lens using nanoscale polymer-dispersed liquid crystals

Author(s) -

Hongwen Ren,

YunHsing Fan,

ShinTson Wu

Publication year - 2003

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1604943

Subject(s) - fresnel lens , materials science , optics , lens (geology) , nanoscopic scale , fabrication , polarization (electrochemistry) , zone plate , voltage , fresnel zone , optoelectronics , liquid crystal , polymer , diffraction , fresnel number , simple lens , focal length , nanotechnology , chemistry , composite material , physics , medicine , alternative medicine , pathology , quantum mechanics

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.

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