Open AccessHighly efficient and polarization-independent Fresnel lens based on dye-doped liquid crystal
Author(s) -
L. Y. Lin,
HungChang Jau,
TungChing Lin,
Andy Ying–Guey Fuh
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.002900
Subject(s) - optics , materials science , fresnel lens , polarization (electrochemistry) , liquid crystal , diffraction efficiency , fresnel number , fresnel equations , lens (geology) , doping , optoelectronics , diffraction , refractive index , physics , chemistry
We demonstrated a highly efficient, polarization-independent and electrically tunable Fresnel lens based on dye-doped liquid crystal using double-side photoalignment technique. The maximum diffraction efficiency reaches 37%, which approaches the theoretical limit ~41%. Such a lens functions as a half-wave plate, and this feature could be well preserved under the applied voltage. In addition, the device is simple to fabricate, and has fast switching responses between focusing and defocusing state.