Xia, J.2023-02-032023-02-032017Xia, J. ve Demirer, M. (2017). ''Switchable large-aperture liquid-crystal diffractive lenses''. Journal of Optoelectronics and Advanced Materials, 19(7-8), 449-453.1454-41641841-7132http://hdl.handle.net/11452/30824Switchable large aperture liquid crystal Fresnel diffractive lenses with aperture diameters of 20-30 mm were designed, fabricated, and demonstrated experimentally with multiple 2 pi radian phase modulation in each Fresnel zone. The structure design with multiple 2 pi radian phase modulation in each Fresnel zone can reduce difficulty in micro-fabrication of the lenses. The influence of electrode gaps of Fresnel lenses on their diffraction efficiencies was examined by numerical analysis. The lenses showed fast switching speed, low driving voltages (<2 V), and high diffraction efficiencies (>62%). They have potential to be applied for autofocus imaging devices and adaptive optics system.eninfo:eu-repo/semantics/closedAccessMaterials scienceOpticsPhysicsDiffractive lensesLiquid-crystal devicesVoltageAdaptive opticsAdaptive systemsDiffraction efficiencyEfficiencyLiquid crystal displaysPhase modulationLiquid crystalsAdaptive optics systemsAperture diameterDiffractive lensFast switchingFresnel diffractive lensLiquid crystal devicesLow driving voltageStructure designArticle0004104699000012-s2.0-8503010968944945319(7-8)Materials science, multidisciplinaryOpticsPhysics, appliedElectrode; Microlens Array; Liquid Crystals