Efficiency improvements in a dichroic dye-doped liquid crystal Fresnel lens
نویسندگان
چکیده
منابع مشابه
Polarization controllable Fresnel lens using dye-doped liquid crystals.
A scattering-free, polarization controllable Fresnel zone plate lens is demonstrated using a photo-induced alignment of the dye-doped liquid crystal film. This photo-aligned liquid crystal zone plate provides orthogonal polarization states for odd and even zones. The different focus orders can be separated because of their different polarization states. The fabrication process is relatively sim...
متن کاملThe Advantages of Dye-Doped Liquid Crystals in Constructing a Fresnel Zone Plate Lens
A Fresnel zone plate lens can be constructed using a dye-doped liquid crystal filled cell and photo-induced alignment techniques. Light passing through a Fresnel zone patterned photo-mask causes the dye-doped liquid crystal to align in such a way to produce odd and even zones on the lens. Diffraction of incident light through the odd and even zones of the lens allows the light to constructively...
متن کاملMicro-patterned photo-aligned ferroelectric liquid crystal Fresnel zone lens.
In this Letter, we disclose a fast switchable Fresnel zone lens (FZL) by confining the ferroelectric liquid crystals (FLCs) in multiple microscopically defined photo-aligned alignment domains. The photo-alignment (PA) offers good control on the anchoring energy (W) by mean of irradiation doses (ID) and thus excellent alignment for FLCs. Two operational modes of the FLCFZL, i.e., FOCUS/OFF and F...
متن کاملSurface-stabilized holography in an azo-dye-doped liquid crystal.
Holograms are recorded by a 514-nm laser polarized parallel to the molecular director in an azo-dye-doped nematic liquid crystal. For some surface treatments, the recorded holograms persist in the dark. For glass surfaces, exposure to light polarized normal to the molecular director erases the hologram. The hologram also vanishes when the sample is heated across the nematic to isotropic phase t...
متن کاملLasing in Dye–Doped Photonic Liquid Crystal Devices
We have investigated the effects of pumping laser’s polarization and incident angles, dye concentration, cell gap, and lasing wavelength on the lasing efficiency of the dye doped cholesteric liquid crystal (CLC) devices. These factors impact the lasing efficiency due to the existence of the photon bleaching and quench in the dye molecules, the competition of the optical gain and loss in the med...
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ژورنال
عنوان ژورنال: Optics Express
سال: 2019
ISSN: 1094-4087
DOI: 10.1364/oe.27.026799