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Photoinduced circular anisotropy in side-chain azobenzene polyesters |
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| Authors: | L Nikolova T Todorov M Ivanov F Andruzzi S Hvilsted PS Ramanujam |
| Affiliation: | a Central Laboratory of Optical Storage and Processing of Information, Bulgarian Academy of Sciences, P.O. Box 95, 1113, Sofia, Bulgaria b CNR, Department of Chemical Engineering, University of Pisa, I-56100, Pisa, Italy c Department of Solid State Physics, RISØ National Laboratory, DK-4000, Roskilde, Denmark d Optics and Fluid Dynamics Department, RISØ National Laboratory, DK-4000, Roskilde, Denmark |
| Abstract: | We report for the first time the inducing of large circular anisotropy in previously unoriented films of side-chain azobenzene polyesters on illumination with circularly polarized light at a wavelength of 488 nm. The circular dichroism and optical activity are measured simultaneously in real time at two wavelengths, 488 nm and 633 nm. The photoinduced optical activity has been measured to be 104 deg/cm and the circular dichroism has been found to be on the order of 0.3. |
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