Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 13, Issue 36, Pages 16150-16158Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cp21098j
Keywords
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Funding
- National Natural Science Foundation of China [50875251, 21074123, 91027024, 50973101]
- Chinese Academy of Sciences [kjcx2-yw-m11]
- German Research Foundation DFG as part of the Cluster of Excellence Integrative Production Technology for High-Wage Countries''
- Fraunhofer society
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In this paper, we investigated the effect of light driving force induced surface deformation on azobenzene-containing polymers. The surface deformation is attributed to light-induced mass migration inside the polymers. Circular cap arrays are firstly fabricated by high power laser ablation via polarization controlled three-beam interference. The circular caps are subsequently exposed to polarization controlled two-beam interfering field. The results illuminate that when the interfering laser beams are both set to P polarization, the circular caps are deformed. While the laser beams are of other interfering modes like (S, S) and (+45 degrees, -45 degrees), the caps are seldom deformed. The circular caps are also exposed to single intensity-homogeneous linearly polarized laser beam. The deformation of the caps keeps the same direction as the irradiating polarization. A model based on the focusing effect of the circular caps is addressed to explain the origin of the light driving force for mass migration in azopolymers. The all-optical approach for the production of deformed caps can be used to generate aspherical lens, which may be applied to many domains.
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