Application of Photopolymer Materials in Holographic Technologies

Abstract

The possibility of the application of acrylate compositions and Bayfol HX photopolymers in holographic technologies is considered. The holographic characteristics of materials, their advantages, and limitations in relation to the tasks of obtaining holographic elements based on periodic structures are given. The conditions for obtaining controlled two and multichannel diffraction beam splitters are determined with advantages in terms of the simplicity of the fabrication process. The diffraction and selective properties of volume and hybrid periodic structures by radiation incidence in a wide range of angles in three-dimensional space are investigated, and new properties are identified that are of interest for the development of elements of holographic solar concentrators with advantages in the material used and the range of incidence angles. A new application of polymer materials in a new method of holographic 3D printing for polymer objects with arbitrary shape fabrication based on the projection of a holographic image of the object into the volume of photopolymerizable material is proposed, the advantage of which, relative to additive 3D printing technologies, is the elimination of the sequential synthesis of a three-dimensional object. The factors determining the requirements for the material, fabrication conditions, and properties of three-dimensional objects are identified and investigated.

Resonant and Sensing Performance of Volume Waveguide Structures Based on Polymer Nanomaterials

“…The stable ordered structures are formed as a result of diffusion redistribution of the nanocomposite components upon polymerization in a spatially inhomogeneous light field [ 7 , 8 , 9 , 10 , 11 , 12 ]. The use of photopolymerizable nanocomposites allows the fabrication of one-, two-, and three-dimensional periodic structures of large size and high uniformity by a one-step method of holographic lithography, for example [ 13 , 14 , 15 , 16 ] and references therein. The holographic method also provides precise control over symmetry and periodicity of the structures.…”

Properties of Holographic Elements Based on Periodic Structures in a Wide Range of Angles of Incidence

“…Let us consider the properties of nonslanted volume gratings recorded in the Bayfol HX photopolymer. Results shown in Figures 3 and 4 refer to the structures recorded in the area of optimal conditions from the point of view of obtaining the maximal diffraction efficiency, found experimentally and presented in our previous article [14]. Structures were recorded under the following conditions: the wavelength of the recording radiation was 633 nm, the angle between the beams was 23 • , the period of the structures was 1.6 µm, and exposure time was 10 s (at power density of 12 mW/cm 2 ).…”

“…Measurements according to Scheme 2 (when the sample was rotated by 90 • ) produced more interesting results (partially considered in our other article [14]). Other authors [9] showed the possibility to obtain a wide contour of angular selectivity (with a half width of about 80 • and maximal diffraction efficiency in the angular range of about 40 • ) by varying the incident direction along the plane perpendicular to the two recording beams.…”

“…A hybrid structure is a volume grating with refractive index modulation, on the surface of which a relief grating is formed. In our works [14,17], the possibility of obtaining hybrid structures in acrylate compositions was shown. Gratings with a significant relief height were formed in a narrow range of exposures.…”

Holographic Recording Performance of Acrylate-Based Photopolymer under Different Preparation Conditions for Waveguide Display

“…[ 11 ]. Among them, photopolymer is widely used in holographic waveguide displays [ 12 , 13 , 14 , 15 ], optical holographic storage [ 16 ], holographic anti-counterfeiting [ 17 ], optical communication [ 18 ], holographic solar concentrators [ 19 ], and holographic beam-shaping diffractive diffusers [ 20 ] due to its advantages, which include high diffraction efficiency, high sensitivity, low price and easy preparation. To date a variety of photopolymers (PQ/PMMA, PVA/AA, etc.)…”