Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2025-01-02T21:14:10.006Z Has data issue: false hasContentIssue false
  • English
  • Français

Thermoassisted Photorecording in Chiral Smectic Azodye Copolymers

Published online by Cambridge University Press:  15 March 2011

Mikhail V. Kozlovsky ,
Wolfgang Haase  and
Matthias Rehahn
Mikhail V. Kozlovsky
Affiliation:
Inst. of Physical Chemistry, Darmstadt University of Technology, Petersenstr. 20, 64287 Darmstadt, Germany
Wolfgang Haase
Affiliation:
Inst. of Physical Chemistry, Darmstadt University of Technology, Petersenstr. 20, 64287 Darmstadt, Germany
Matthias Rehahn
Affiliation:
German Plastics Institute, Schlossgartenstrasse 6, 64289 Darmstadt, Germany
Get access

Abstract

Illumination of photochromic liquid-crystalline (PCLC) copolymer films with polarized light during the mesophase formation has been studied. Both thick pressed and thin spin-coated, the films show prominent increase in photoinduced orientation, as compared with conventional isothermal photorecording. Two methods of the thermoassisted recording have been suggested, one of those with simultaneous cooling of the film and another one after a shock heating and quenching. The photoinduced birefringence, Δnind, and the order parameter of photochromic groups, Sazo, have been measured. The thermally assisted recording produces holographic gratings with high diffraction efficiency, η, up to 20-30%.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 709: Symposium CC – Advances in Liquid Crystalline Materials and Technologies , 2001 , CC1.8.1
Copyright
Copyright © Materials Research Society 2002

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Applied Photochromic Polymer Systems, ed. McArdle, C.B. (Blackie, 1992) 255 p.Google Scholar
2. Polymers as Electrooptical and Photooptical Active Media, ed. Shibaev, V.P. (Springer, 1996) 211 pp.Google Scholar
3. Kozlovsky, M.V., Blinov, L.M., and Haase, W., “Chiral polymers with photoaffected phase behaviour for optical data storage”, Photoreactive Organic Thin Films, ed. Sekkat, Z. and Knoll, W. (Academic Press, 2002) (in press).Google Scholar
4. Labarthet, F.L., Freiberg, S., Pellerin, C., Pésolet, M., Natansohn, A., Rochon, P., Macromols. 33, 6815 (2000)Google Scholar
5. Stumpe, J., Fischer, Th., Rutloh, M., Rosenhauer, R., and Meier, J. G, Proc. SPIE 3800, 150, 1999.Google Scholar
6. Wu, Y., Mamiya, J., Kanazawa, A., Shiono, T., Ikeda, T., and Zhang, Q., Macromols. 32, 8829 (1999)Google Scholar
7. Kozlovsky, M.V., Shibaev, V.P., Stakhanov, A.I., Weyrauch, T., and Haase, W. Liquid Crystals, 24, 759 (1998)Google Scholar
8. Kozlovsky, M.V. and Haase, W., Macromol. Symp. 137, 47 (1999).Google Scholar
9. Kozlovsky, M.V., Meier, J.G., and Stumpe, J., Macromol. Chem. Phys. 201, 2377 (2000).Google Scholar
10. Kozlovsky, M.V. and Demikhov, E., Mol. Cryst. Liq. Cryst., 282, 11–16 (1996).Google Scholar
11. Cipparrone, G., Mazzulla, A., Kozlovsky, M.V., Palto, S.P., Yudin, S.G., and Blinov, L.M., Mol. Materials 12, 359 (2000).Google Scholar
12. Blinov, L.M., Cipparone, G., Kozlovsky, M.V., Lazarev, V.V., and Scaramuzza, N. Optics Commun. 73, 137 (2000).Google Scholar