Azo polymers for reversible optical storage. 8. The effect of polarity of the azobenzene groups

1995 ◽  
Vol 73 (11) ◽  
pp. 1773-1778 ◽  
Author(s):  
Mei-Sing Ho ◽  
A. Natansohn ◽  
C. Barrett ◽  
P. Rochon
Keyword(s):  
Optical Storage ◽  
Side Chain ◽  
Relaxation Rates ◽  
No Donor ◽  
Azo Polymers ◽  
Azobenzene Moiety ◽  
Donor Acceptor ◽  
Storage Properties ◽  
Effect Of Polarity ◽  
Azobenzene Groups

Poly[4′-[[(2-methacryloyloxy)ethyl]ethylamino]azobenzene] (pMAEA) was prepared. Its reversible optical storage properties were studied and compared with the properties of previously reported poly[4-(2-methacryloyloxy)ethylazobenzene] (pMEA) and poly[4-nitrophenyl-4′-[[2-(methacryloyloxy)ethyl]ethyl-amino]phenyldiazene] (pDR1M). The effect of the dipole moment of the azobenzene moiety on the optical storage properties was studied by comparing the photochemically induced birefringence "writing" and "relaxation" behaviors. The writing and relaxation rates are both in the order pDR1M > pMAEA > pMEA. In addition, pDR1M, which contains donor/acceptor substituents in the azobenzene side chain, exhibits the highest saturation level of optically induced birefringence. The fraction of birefringence conserved after relaxation is lowest for pMEA, which has no donor/acceptor substituents in the azobenzene side chain, and highest for pDR1M. Keywords: polymers, azobenzene type, birefringence, photochemically induced orientation, reversible optical storage.

AZO Polymers for Reversible Optical Storage

1992 ◽  
Vol 277 ◽  
Author(s):  
A. Natansohn ◽  
P. Rochon ◽  
J. Gosselin ◽  
S. Xie
Keyword(s):  
Second Harmonic ◽  
Optical Memory ◽  
Argon Laser ◽  
Optical Storage ◽  
Holographic Storage ◽  
Azo Polymers ◽  
Circularly Polarized ◽  
Writing Beam ◽  
Potential Applications ◽  
Azobenzene Groups

ABSTRACTAmorphous high-Tg polymers films containing electron-donor-electronacceptor substituted azobenzene groups can be used as reversible optical storage materials. Optical information can be “written” on the film with a polarized argon laser beam and “read” with a low power HeNe laser. Erasing can be performed with a circularly polarized writing beam. A significant number of writing/erasing cycles can be performed on the same spot. Potential applications in optical memory, holographic storage, waveguides and second harmonic generation are discussed.

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.

Photoresponsive Ion-Conducting Behavior of Polysiloxanes Carrying a Crowned Azobenzene Moiety at the Side Chain

1994 ◽  
Vol 27 (7) ◽  
pp. 1842-1846 ◽  
Author(s):  
Hideo Tokuhisa ◽  
Masaaki Yokoyama ◽  
Keiichi Kimura
Keyword(s):  
Side Chain ◽  
Azobenzene Moiety ◽  
Ion Conducting

Azo Polymers for Reversible Optical Storage. 7. The Effect of the Size of the Photochromic Groups

1995 ◽  
Vol 28 (18) ◽  
pp. 6124-6127 ◽  
Author(s):  
M. S. Ho ◽  
A. Natansohn ◽  
P. Rochon
Keyword(s):  
Optical Storage ◽  
Azo Polymers

Rare earth orthoniobate photochromics with self-activated upconversion emissions for high-performance optical storage applications

2021 ◽  
Vol 9 (39) ◽  
pp. 13841-13850
Author(s):  
Zhen Zhang ◽  
Lingju Guo ◽  
Haiqin Sun ◽  
Dengfeng Peng ◽  
Hua Zou ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Performance ◽  
Optical Storage ◽  
Upconversion Emissions ◽  
Storage Properties

Novel self-activated upconversion photochromics exhibit high-performance optical storage properties.

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