Reversible change of birefringence sign by optical and thermal processes in an azobenzene polymethacrylate
- Departamento de Fisica de la Materia Condensada, Instituto de Ciencia de Materiales de Aragon, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza (Spain)
Birefringence ({delta}n) induced in an azobenzene polymethacrylate by combination of biphotonic and thermotropic processes has subsequently been changed in sign by room temperature illumination with linearly polarized blue light. The sign of {delta}n can be reversed again, by simply heating up the film to 100 deg. C. This change of {delta}n between positive and negative values can be repeated several times. Besides, by appropriate choice of film thickness and blue light irradiation conditions the same absolute value for positive and negative {delta}n values can be obtained.
- OSTI ID:
- 20636929
- Journal Information:
- Applied Physics Letters, Vol. 86, Issue 2; Other Information: DOI: 10.1063/1.1851012; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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