Fabrication of optical vortex lattices based on holographic polymer-dispersed liquid crystal films

Abstract

This Letter demonstrates optical vortex lattices based on holographic polymer-dispersed liquid crystal (HPDLC) films. The fabrication method uses a phase-only reflective spatial light modulator with numerically calculated phase profiles loaded on it to simplify multi-helical-wave interference. The beam profiles of the diffraction beams are simulated using the Fourier transform and compared with experimental results. The topological charges of the 1st-order diffraction beams reconstructed from the HPDLC films are examined using a Michelson interferometer.

Compact And Scalable Large Vortex Array Generation Using Azocarbazole Polymer And Digital Hologram Printing Technique

“…Zhuang et al [15] have reported the generation of vortex array of size 3 × 3 with topological charge ranging from l=-2 to l=3 using a micro CGH fabricated on lithium niobate crystal using direct laser writing. Emission of vortex array from holographically recorded vortex lattices on nematic liquid crystal cells [16] and polymer dispersed liquic crystal films [17] has been reported. Here the recorded sample is illuminated with an array of circularly polarized beams inorder to generate a corresponding array of vortex beams.…”

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

“…Morphology and diffraction properties of the grating depend upon writing set-up, materials, diffusion rate, curing conditions and the phase separation process Typical morphology, the working principle and electro-optical properties of HPDLCs are thoroughly elaborated in chapter 5 of the recently published book [ 109 ]. Promising applications of HPDLCs include diffraction gratings (DGs), polymer slices (POLICRYPS), waveguides, autostereoscopic image splitter, three-dimensional (3D) data storage and photonic crystals [ 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 ].…”

Effect of Noncovalent Interaction of a Polymer-Dispersed Liquid Crystal for Interferometric Applications over a Range of Low Frequencies

“…The mixture film turns transparent when the refractive indexes of the UV curable agent and the liquid crystal become almost the same. Due to this adjustability trait, PDLCs have attracted notable attention because of their potential in a broad range of applications, in optical shutters and switchable windows, − switchable smart glass using UV-initiated cationic polymerization, a liquid crystal/polymer composite film with programmable electro-optical properties, doped LC devices, − self-powered switchable solar windows, holographic applications, − and autostereoscopic display. , Porous uniformity is also well-explained for nucleated LC droplets aiming rubbing polyimide layers with anchoring energy greater than 1 × 10 –4 J/m 2 . The dielectric properties of PDLCs were thoroughly studied by Kelly and Seekola in 1990; this outlines that there is an unambiguous relationship between conduction in the liquid crystal droplets and operating frequencies.…”