Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
90 (2001), S. 5866-5870
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
A nonlinearly optical method to induce the birefringence in azo liquid crystal polymers by the optical–optical isomerization cycle (O–O cycle) process is proposed in theory and implemented by experiments. In the O–O cycle, the two isomerization steps of trans-cis and cis-trans are both induced by light. In the nonlinearly O–O cycle, at least one step involves the nonlinearly optical absorption. It has been demonstrated that the permanent birefringence was induced in azo polymer P–CN films with a visible light source at 532 nm wavelength by the nonlinearly O–O cycle. The nonlinear nature of the photoisomerization process in P–CN was verified and a high nonlinear absorption coefficient of 40 cm/W was measured by use of the Z-scan technique. © 2001 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1415362
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