A new holographic recording material and its diffraction efficiency increase effect: the use of photoinduced surface deformation in azo-polymer film

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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Effect of the Structure and Content of Carbazolyl-Containing Co-oligomers on the Diffraction Efficiency of Holographic Recording Media

Theoretical and Experimental Chemistry ◽

10.1007/s11237-015-9399-5 ◽

2015 ◽

Vol 51 (1) ◽

pp. 67-71 ◽

Cited By ~ 3

Author(s):

Yu. P. Getmanchuk ◽

N. A. Davidenko ◽

I. I. Davidenko ◽

E. V. Mokrinskaya ◽

V. A. Pavlov ◽

...

Keyword(s):

Diffraction Efficiency ◽

Holographic Recording ◽

Recording Media ◽

Holographic Recording Media

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Nanometer Photothermal Heating and Cooling Dynamics of Azo Polymer Film Elucidated by Analyzing Nanosecond Laser-Induced Expansion/Contraction Behavior

Japanese Journal of Applied Physics ◽

10.1143/jjap.43.5337 ◽

2004 ◽

Vol 43 (8A) ◽

pp. 5337-5346 ◽

Cited By ~ 2

Author(s):

Takuji Tada ◽

Tsuyoshi Asahi ◽

Masaaki Tsuchimori ◽

Osamu Watanabe ◽

Hiroshi Masuhara

Keyword(s):

Polymer Film ◽

Nanosecond Laser ◽

Heating And Cooling ◽

Azo Polymer ◽

Photothermal Heating

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

Polymers ◽

10.3390/polym13203517 ◽

2021 ◽

Vol 13 (20) ◽

pp. 3517

Author(s):

Horst Berneth ◽

Friedrich Karl Bruder ◽

Thomas Fäcke ◽

Sven Hansen ◽

Koichi Kawamura ◽

...

Keyword(s):

Alkyl Radical ◽

Pulsed Laser ◽

Holographic Recording ◽

Radical Species ◽

Holographic Gratings ◽

Initiation System ◽

Volume Holograms ◽

Recording Material ◽

Safranine O ◽

Dye Molecule

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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