Vertical angular selectivity and grating degeneracy of volume holographic gratings

1996 ◽  
Author(s):  
Quan Yuan ◽  
Shiquan Tao ◽  
Zhuqing Jiang ◽  
Xinchang Yang
Keyword(s):  
Holographic Gratings ◽  
Angular Selectivity

Design of high-performance holographic gratings using siloxane-containing mesogenic compounds

2006 ◽  
Vol 78 (10) ◽  
pp. 1835-1842 ◽  
Author(s):  
Yusuke Kawakami ◽  
Man He ◽  
Yeong Hee Cho
Keyword(s):  
Diffraction Efficiency ◽  
Ring Opening ◽  
High Performance ◽  
Liquid Crystalline ◽  
Diglycidyl Ether ◽  
Matrix Component ◽  
Holographic Gratings ◽  
Glycol Diacrylate ◽  
Trimethylolpropane Triacrylate ◽  
Angular Selectivity

Fine holographic gratings were fabricated using siloxane- and mesogen-containing compounds. A grating with 40 % diffraction efficiency was formed with 10 wt % non-liquid-crystalline 4-methoxyphenyl 4-[4-(pentamethyldisiloxanyl)butoxy]benzoate and trimethylolpropane triacrylate. 4-Methoxyphenyl 4-[4-(1,1,3,3,5,5,5-heptamethyltrisiloxan-1-yl)butoxy]-benzoate gave 50 % diffraction efficiency and angular selectivity of 5°. Siloxane-containing liquid-crystalline compounds were also effective in fabricating fine gratings. These compounds induced distinct phase separation over a concentration range from 6 to 20 wt % in the formation of holographic gratings. The use of ring-opening polymerizable bifunctional epoxides as one of the reactive cross-linking matrix components, together with penta- or tetra-acrylate initiated by 3,3'-carbonylbis(7-diethylaminocoumarin)diphenyliodonium hexafluorophosphate, greatly improved the diffraction efficiency. Fine gratings with 70 and 78 % diffraction efficiency and angular selectivity of 5° were formed with 10 wt % 4-cyano-4'-[(5-heptamethyltrisiloxan-1-yl)pentyloxy]-biphenyl and 4-cyanophenyl 4-[(5-heptamethyltrisiloxan-1-yl)pentyloxy]benzoate using pentaerythritol pentaacrylate-neopentylglycol diglycidyl ether-tripropylene glycol diacrylate (4:5:1) as the polymer matrix component.

scholarly journals Technique for characterization of dimensional changes in slanted holographic gratings by monitoring the angular selectivity profile

2008 ◽  
Vol 33 (17) ◽  
pp. 1981 ◽  
Author(s):  
Nitesh Pandey ◽  
Izabela Naydenova ◽  
Suzanne Martin ◽  
Vincent Toal
Keyword(s):  
Holographic Gratings ◽  
Dimensional Changes ◽  
Angular Selectivity

Three-dimensional coupled wave study for finite-sized anisotropic volume holographic gratings under ultrashort pulsed beam readout

2007 ◽  
Vol 24 (6) ◽  
pp. 1799 ◽  
Author(s):  
Chunhua Wang ◽  
Liren Liu ◽  
Aimin Yan ◽  
Dean Liu ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Holographic Gratings ◽  
Coupled Wave

Polarization holographic gratings in PAZO polymer films doped with particles of biometals

2021 ◽  
Vol 411 ◽  
pp. 113196
Author(s):  
A. Stoilova ◽  
G. Mateev ◽  
D. Nazarova ◽  
L. Nedelchev ◽  
E. Stoykova ◽  
...  
Keyword(s):  
Polymer Films ◽  
Holographic Gratings

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

Polymers ◽  
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.

scholarly journals Spectral multiplexing using stacked volume-phase holographic gratings – I

2017 ◽  
Vol 469 (2) ◽  
pp. 2412-2422 ◽  
Author(s):  
A. Zanutta ◽  
M. Landoni ◽  
M. Riva ◽  
A. Bianco
Keyword(s):  
Holographic Gratings ◽  
Volume Phase ◽  
Spectral Multiplexing

Orientational holographic gratings observed in nematics aligned by carbon nanotube film

2007 ◽  
Vol 88 (1) ◽  
pp. 101-104 ◽  
Author(s):  
X. Sun ◽  
F. Yao ◽  
Y. Pei ◽  
J. Zhang ◽  
C. Hou
Keyword(s):  
Carbon Nanotube ◽  
Holographic Gratings ◽  
Carbon Nanotube Film
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