A New Three-Component Photo-Initiating System for Visible Light Recording of Volume Holograms with Single-Pulsed Laser

Versatile substituted electron-deficient trichloromethylarenes can easily be synthesized and combined with a Safranine O/triarylalkylborate salt to form a highly efficient three-component photo-initiation system that starts free radical polymerization to finally form holographic gratings with a single-pulsed laser. The mechanism of this photo-initiation most likely relies on an electron transfer from the borate salt into the semi-occupied HOMO of the excited dye molecule Safranine O, which after fragmentation generates an initiating alkyl radical and longer-lived dye radical species. This dye radical is most probably oxidized by the newly introduced trichloromethylarene derivative as an electron acceptor. The two generated radicals from one absorbed photon initiate the photopolymerization and form index gratings in a suitable holographic recording material. This process is purely photonic and does not require further non-photonic post treatments.

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Spatial Frequency Response of Epoxy-Based Volume Holographic Recording Material

Molecules ◽

10.3390/molecules24061018 ◽

2019 ◽

Vol 24 (6) ◽

pp. 1018

Author(s):

Tina Sabel

Keyword(s):

Spatial Frequency ◽

Frequency Response ◽

High Spatial Frequency ◽

Holographic Recording ◽

Holographic Gratings ◽

Mass Migration ◽

Spatial Frequencies ◽

Recording Material ◽

Wide Range ◽

Transmission And Reflection

Holographic volume phase gratings are recorded in an epoxy-based, free-surface, volume holographic recording material. Light-induced gratings are formed by photo-triggered mass migration caused by component diffusion. The material resolution enables a wide range of pattern spacings, to record both transmission and reflection holograms with many different spatial frequencies. An optimum spatial frequency response is found between the low spatial frequency roll-off and the high spatial frequency cut-off. The influence of the energy density of exposure on the spatial frequency response is investigated. Secondary volume holographic gratings (parasitic gratings) are observed in the high frequency range. The possibility of distinguishing the regular grating from the secondary grating is discussed in the form of probe wavelength detuning.

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New initiation system for holographic recording material

10.1117/12.155012 ◽

1993 ◽

Author(s):

Cunlin Zhang ◽

Meiwen Yu ◽

Yongyuan Yang ◽

Jun Li ◽

Er-jian Wang

Keyword(s):

Holographic Recording ◽

Initiation System ◽

Recording Material

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

Polymers ◽

10.3390/polym13060936 ◽

2021 ◽

Vol 13 (6) ◽

pp. 936

Author(s):

Zhongwen Shen ◽

Yishi Weng ◽

Yuning Zhang ◽

Chuang Wang ◽

Ao Liu ◽

...

Keyword(s):

Augmented Reality ◽

Diffraction Efficiency ◽

Green Light ◽

Holographic Recording ◽

Holographic Gratings ◽

Preparation Conditions

This work proposes a green light-sensitive acrylate-based photopolymer. The effects of the preparation conditions for the waveguide applied volume holographic gratings (VHGs) were experimentally investigated. The optimum preparation conditions for holographic recording were revealed. After optimization, the peak of VHG diffraction efficiency reached 99%, the diffractive wavelength bandwidth increased from 13 nm to 22 nm, and the corresponding RIM was 0.06. To prove the wide application prospect of the acrylate-based photopolymer in head-mounted augmented reality (AR) displays, green monochromatic volume holographic waveguides were fabricated. The display results showed that the prototype was able to achieve a 28° diagonal FOV and possessed a system luminance of 300 cd/m2.

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Characterization of an acrylamide-based dry photopolymer holographic recording material

Optical Engineering ◽

10.1117/12.186423 ◽

1994 ◽

Vol 33 (12) ◽

pp. 3942 ◽

Cited By ~ 65

Author(s):

Philippe E. Leclere

Keyword(s):

Holographic Recording ◽

Recording Material

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Investigations of As-S-Se thin films for use as inorganic photoresist for digital image-matrix holography

Open Physics ◽

10.2478/s11534-010-0133-6 ◽

2011 ◽

Vol 9 (5) ◽

Cited By ~ 3

Author(s):

Andrejs Bulanovs ◽

Vjacheslavs Gerbreders ◽

George Kirilovs ◽

Janis Teteris

Keyword(s):

Thin Films ◽

Digital Image ◽

Diffraction Grating ◽

Spatial Light Modulator ◽

Laser Intensity ◽

Holographic Recording ◽

Light Modulator ◽

Frame Size ◽

Holographic Gratings ◽

Relief Phase

AbstractAs-S-Se chalcogenide thin films are successfully employed in classical and dot-matrix holography as inorganic photoresists for obtaining a relief-phase hologram. However using these films for image-matrix hologram recording has not been studied due to some features of image-matrix technology. For the applied research of the optical properties of As-S-Se films an experimental device of digital image-matrix holographic recording based on 100 mW 405 nm semi-conductor laser and Spatial Light Modulator (SLM) has been created. The device has the following main parameters: 140 × 105 µm frame size; laser intensity during exposure 10 W/cm2. With the help of this device diffraction grating and security holograms were recorded on As-S-Se thin films. The work reported herein presents results of an experimental study of how diffraction efficiency (DE) of the received relief-phase holographic gratings depends on an exposure and period. Diffraction grating profiles and speed of etching corresponding to different exposure doses are shown. Hologram samples with DE = 65% have been received which allows for using chalcogenide film as alternative to organic photoresists in applied dot-matrix and image-matrix holography.

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DOPED POLY(METHYL METHACRYLATE) PHOTOPOLYMERS FOR HOLOGRAPHIC DATA STORAGE

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863506003244 ◽

2006 ◽

Vol 15 (02) ◽

pp. 239-252 ◽

Cited By ~ 24

Author(s):

SHIUAN HUEI LIN ◽

JUNE-HUA LIN ◽

PO-LIN CHEN ◽

YI-NAN SHIAO ◽

KEN Y. HSU

Keyword(s):

Methyl Methacrylate ◽

Data Storage ◽

Physical Mechanism ◽

Dynamic Range ◽

Optical Quality ◽

Holographic Recording ◽

Holographic Data Storage ◽

Poly Methyl Methacrylate ◽

Recording Material ◽

Good Optical Quality

In this paper, we report our investigations on thick holographic recording material of the phenanthrenequinone doped poly(methyl methacrylate) (PQ:PMMA) photopolymer. The design strategy and fabrication technique for making thick polymer samples with negligible shrinkage and good optical quality are presented. The physical mechanism for holographic recording in PQ:PMMA material is described, and methods for improving are proposed. Based on these methods, photopolymer samples with different compositions are fabricated and experimentally characterized. The results show that by modifying compositions, the material sensitivity and dynamic range for volume holographic recording have been improved.

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