On the Inscription of Period and Half-Period Surface Relief Gratings in Azobenzene-Functionalized Polymers

2008 ◽  
Vol 112 (15) ◽  
pp. 4526-4535 ◽  
Author(s):  
Anna Sobolewska ◽  
Andrzej Miniewicz
Keyword(s):  
Surface Relief ◽  
Half Period ◽  
Functionalized Polymers ◽  
Surface Relief Gratings

Photofabrication of Surface Relief Gratings using Post Functionalized Azo Polymers

1997 ◽  
Vol 488 ◽  
Author(s):  
Sukant K. Tripathy ◽  
Jayant Kumar ◽  
Dong-Yu Kim ◽  
Xinli Jiang ◽  
Xiaogong Wang ◽  
...  
Keyword(s):  
Surface Relief ◽  
Coupling Reaction ◽  
Functionalized Polymers ◽  
Azo Coupling ◽  
Azo Polymers ◽  
Self Assembling ◽  
Donor Acceptor ◽  
Surface Relief Gratings ◽  
Ionizable Groups ◽  
Azobenzene Groups

AbstractA series of azobenzene functionalized polymers has been synthesized by post polymerization azo coupling reaction. Photo-fabrication of surface relief gratings were studied on the polymer films. Epoxy based azo polymers were prepared by post azo coupling reaction to form polymers containing donor-acceptor type azo chromophores. The azo chromophores were designed to contain ionizable groups to impart self-assembling and photoprocessing capabilities to the polymers. The polymers containing 4-(4-(carboxylic acid)phenylazo)aniline chromophores can be directly photofabricated to form surface relief gratings with large surface modulations. Charge interactions had a strong influence on the details of the writing process. A new soluble polydiacetylene, post-functionalized with azobenzene groups was also prepared. Large amplitude surface gratings could be fabricated on this polydiacetylene film as well.

scholarly journals Formation of half-period surface relief gratings in azobenzene containing polymer films

2020 ◽  
Vol 126 (9) ◽  
Author(s):  
Joachim Jelken ◽  
Carsten Henkel ◽  
Svetlana Santer
Keyword(s):  
Polymer Film ◽  
Polymer Films ◽  
Surface Relief ◽  
Incident Light ◽  
Glassy State ◽  
Polarized Light ◽  
Half Period ◽  
Polarization Distribution ◽  
Linearly Polarized ◽  
Set Up

Abstract We study the peculiar response of photo-sensitive polymer films irradiated with a certain type of interference pattern where one interfering beam is S-polarized, while the second one is P-polarized. The polymer film, although in a glassy state, deforms following the local polarization distribution of the incident light, and a surface relief grating (SRG) appears whose period is half the optical one. All other types of interference patterns result in the matching of both periods. The topographical response is triggered by the alignment of photo-responsive azobenzene containing polymer side chains orthogonal to the local electrical field, resulting in a bulk birefringence grating (BBG). We investigate the process of dual grating formation (SRG and BBG) in a polymer film utilizing a dedicated set-up that combines probe beam diffraction and atomic force microscopy (AFM) measurements, and permits acquiring in situ and in real-time information about changes in local topography and birefringence. We find that the SRG maxima appear at the positions of linearly polarized light (tilted by 45° relative to the grating vector), causing the formation of the half-period topography. This permits to inscribe symmetric and asymmetric topography gratings with sub-wavelength period, while changing only slightly the polarization of one of the interfering beams. We demonstrate an easy generation of sawtooth profiles (blazed gratings) with adjustable shape. With these results, we have taken a significant step in understanding the photo-induced deformation of azo-polymer films.

Effects of solvent, film thickness, and hydrogen bonding on surface-relief gratings

2009 ◽  
Vol 49 (5) ◽  
pp. 922-929 ◽  
Author(s):  
Woo-Hyuk Jung ◽  
Ki-Tae Lee ◽  
Dong-Han Lee ◽  
Sang-Cheol Han ◽  
Yang Kim ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Film Thickness ◽  
Surface Relief ◽  
Surface Relief Gratings

The Role of Azopolymer/Dendrimer Layer-by-Layer Film Architecture in Photoinduced Birefringence and the Formation of Surface-Relief Gratings

Langmuir ◽  
2006 ◽  
Vol 22 (14) ◽  
pp. 6177-6180 ◽  
Author(s):  
David S. dos Santos, ◽  
Marcos R. Cardoso ◽  
Fabio L. Leite ◽  
Ricardo F. Aroca ◽  
Luiz H. C. Mattoso ◽  
...  
Keyword(s):  
Surface Relief ◽  
Layer By Layer ◽  
Layer Film ◽  
Photoinduced Birefringence ◽  
Surface Relief Gratings

scholarly journals Fabrication of switchable liquid crystal devices using surface relief gratings in photopolymer

2007 ◽  
Vol 20 (S1) ◽  
pp. 198-201 ◽  
Author(s):  
Pavani Kotakonda ◽  
Izabela Naydenova ◽  
Robert Howard ◽  
Suzanne Martin ◽  
Vincent Toal
Keyword(s):  
Liquid Crystal ◽  
Surface Relief ◽  
Liquid Crystal Devices ◽  
Surface Relief Gratings
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