Experimental studies of surface relief gratings on polymer Films

1995 ◽  
Vol 413 ◽  
Author(s):  
X. L. Jiang ◽  
D. Y. Kim ◽  
L. Li ◽  
V. Shivshankar ◽  
J. Kumar ◽  
...  
Keyword(s):  
Laser Beam ◽  
Polymer Films ◽  
Surface Relief ◽  
Experimental Studies ◽  
Laser Beams ◽  
Recording Conditions ◽  
Surface Modulation ◽  
High Diffraction Efficiency ◽  
Surface Relief Gratings ◽  
High Diffraction

ABSTRACTWe report our investigation on the recording of surface relief gratings on azobenzene containing polymer films by laser beams with different polarizations. Experimental evidence shows that it is necessary to have spatial variations of both magnitude and direction of net electric field in the films to record surface relief gratings. Large surface modulation (> 3500 Å) and high diffraction efficiency (about 30%) were obtained under optimized recording conditions. In addition, polarization dependent erasure of the gratings by a single laser beam has been studied.

scholarly journals Design and Realization of a Compact Efficient Beam Combiner, Based on Liquid Crystal Pancharatnam–Berry Phase Gratings

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 220
Author(s):  
Boxuan Gao ◽  
Jeroen Beeckman ◽  
Kristiaan Neyts
Keyword(s):  
Liquid Crystal ◽  
Berry Phase ◽  
Polarized Light ◽  
Laser Beams ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Beam Combiner ◽  
High Diffraction Efficiency ◽  
High Diffraction ◽  
Crystal Mixture

We demonstrate a laser beam combiner based on four photo-patterned Pancharatnam–Berry (PB) phase gratings, which is compact and has high diffraction efficiency for incident circularly polarized light. The nematic liquid crystal mixture E7 is used as anisotropic material, and the thickness of the layer is controlled by spacers. The beam combiner can bring two parallel laser beams closer to each other while remaining parallel. This work shows the potential to realize components based on flat optical LC devices.

Optically Induced Dynamics of Isocyanate Organic Films Containing Azobenzene Chromophores

2000 ◽  
Vol 660 ◽  
Author(s):  
Mi Jeong Kim ◽  
Eun-Mi Seo ◽  
Yeong-Deuk Shin ◽  
Jae-Suk Lee ◽  
Dong-Yu Kim
Keyword(s):  
Surface Relief ◽  
Polymeric Materials ◽  
Polymeric Film ◽  
Laser Beams ◽  
Organic Films ◽  
Low Molecular Weight ◽  
Polymeric Thin Films ◽  
Surface Grating ◽  
Azobenzene Group ◽  
Surface Modulation

ABSTRACTThe photophysical formation of surface relief grating (SRG) was compared between isocyanate-based polymeric and non-polymeric thin films of low molecular weight organics containing azobenzene group. The non-polymeric film forms faster and more efficient surface grating formation than the polymeric film when exposed to an interference pattern of polarized Ar+ laser beams at 488 nm. However, the polymeric materials exhibited higher stability of SRG and orientation of azobenzenes than non-polymeric ones. The relation between the rate of photoinduced surface modulation and orientation of azobenzenes is discussed.

Well-ordered TiO2nanostructures fabricated using surface relief gratings on polymer films

2006 ◽  
Vol 16 (4) ◽  
pp. 370-375 ◽  
Author(s):  
Seok-Soon Kim ◽  
Chaemin Chun ◽  
Jae-Chul Hong ◽  
Dong-Yu Kim
Keyword(s):  
Polymer Films ◽  
Surface Relief ◽  
Surface Relief Gratings

Surface relief gratings on azo polymer films through reversible photoisomerization by the irradiation of a monochromatic light

2006 ◽  
Vol 102 (4) ◽  
pp. 3123-3126 ◽  
Author(s):  
Md. Zahangir Alam ◽  
Tomoko Ohmachi ◽  
Tomonari Ogata ◽  
Takamasa Nonaka ◽  
Seiji Kurihara
Keyword(s):  
Polymer Films ◽  
Surface Relief ◽  
Monochromatic Light ◽  
Azo Polymer ◽  
Surface Relief Gratings

scholarly journals Photoinduction of surface-relief gratings during all-optical poling of polymer films

2004 ◽  
Vol 29 (1) ◽  
pp. 98 ◽  
Author(s):  
Aleksandra Apostoluk ◽  
Jean-Michel Nunzi ◽  
Céline Fiorini-Debuisschert
Keyword(s):  
Polymer Films ◽  
Surface Relief ◽  
All Optical ◽  
Surface Relief Gratings

Photoinduced surface relief gratings in high-Tg main-chain azoaromatic polymer films

1998 ◽  
Vol 36 (2) ◽  
pp. 283-289 ◽  
Author(s):  
Taek Seung Lee ◽  
Dong-Yu Kim ◽  
Xin Li Jiang ◽  
Lian Li ◽  
Jayant Kumar ◽  
...  
Keyword(s):  
Polymer Films ◽  
Surface Relief ◽  
Main Chain ◽  
Surface Relief Gratings
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