Abstract
We propose the fabrication of surface relief holograms via selective SiO2 deposition on soda-lime silicate glass substrates. Initially, the original hologram was recorded on an azobenzene photosensitive polymer film coated on the soda-lime silicate glass by irradiation with a conventional continuous wave Ar+ laser with a wavelength of 514.5 nm. The hologram was transferred to the soda-lime silicate glass surface via a corona discharge treatment as an index modulation hologram, which was created by partial substitution of protons for sodium ions during the corona discharge treatment in air. After the corona discharge treatment, the polymer film was removed from the substrate. The diffraction efficiency of the index hologram on the soda-lime silicate glass was estimated to be 5.8 × 10−2% at a wavelength of 532 nm. Finally, the glass substrate was subjected to corona discharge treatment in air with vaporized cyclic siloxane. A surface relief hologram with the diffraction efficiency of 2.3% was successfully fabricated on the soda-lime silicate glass.
Highlights
Holograms are used to record secure information, display three dimensional images, and create holographic optical elements
We studied a technique for transferring a hologram from an azobenzene polymer onto a soda-lime silicate (SLS) glass substrate using a corona discharge treatment (CDT) [10,11]
The diffraction efficiency increased from 20 to 27% with the depth amplification of the hologram formed by the CDT, which is in agreement with results in previous reports [14,15]
Summary
Holograms are used to record secure information, display three dimensional images, and create holographic optical elements. Since the early days of holograms, various materials have been studied for recording holographs, such as silver halide photosensitive materials, photopolymers, and dichromated gelatins [1,2,3]. Rewritable, post-treatment-free, and polarization recording functional holographic recording materials have been reported, the most notable of which are azobenzene containing polymers [4,5]. Photosensitive materials can record holograms via irradiation with a laser beam at their absorption wavelength. Is attracting attention as a holographic recording material owing to its stable and long-term recording capabilities. With this material it is difficult to record holograms using conventional holographic recording techniques
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