新型含非线性生色团的聚炔共聚物的制备和光限幅

功能材料, 2006, 37(3): 496-499.

新型含非线性生色团的聚炔共聚物的制备和光限幅

尹守春 ^1, , 李刚 ^2, , 徐洪耀 ^3, , 高亚臣 ^4, , 宋瑛林 ^5, , 唐本忠 ^6,

1.安徽大学,化学化工学院及安徽省绿色高分子材料重点实验室,安徽,合肥,230039

2.安徽大学,化学化工学院及安徽省绿色高分子材料重点实验室,安徽,合肥,230039

3.安徽大学,化学化工学院及安徽省绿色高分子材料重点实验室,安徽,合肥,230039

4.哈尔滨工业大学,应用物理系,黑龙江,哈尔滨,150001

5.哈尔滨工业大学,应用物理系,黑龙江,哈尔滨,150001

6.香港科技大学,化学系,香港

基金项目: 国家科学基金(50073001,90206014) The Outstanding Youth Fund of Anhui Province(04044060) Program for New Century Excellent Talents in University(NCET-04-0588)

关键词：取代聚炔 , 光限幅 , 反饱和吸收 , 非线性光学 , Z-扫描

Preparation and optical limiting of a novel soluble phenylacetylene copolymer bearing nonlinear chromophoric pendants

Keywords： optical limiter , reverse saturable absorption , nonlinear optics , Z-scan , polyacetylene

制备了一个新型可溶的含非线性生色团的聚炔共聚物,在8ns脉宽532nm下研究了不同浓度溶液的光限幅性能.采用Z-扫描技术测试了聚合物的激发态吸收,基于非线性理论对光限幅机理进行了讨论.结果表明聚合物的激发态吸收截面大于其基态吸收截面,其光限幅性能主要来源于分子的反饱和吸收(RSA).

A novel soluble conjugated phenylacetylene copolymer containing nonlinear chromophore, poly {[4-ethynyl-4 '-(N, Ndiethylamino)azobenzene]-co-phenylacetylen} was prepared and its optical limiting (OL) properties were investigated in three different concentration solution with 8ns pluses at 532nm wavelength. The excited state absorption cross-section σex of this polymer was measured with the Z-scan technique. The optical limiting mechanism was discussed based on nonlinear absorption theory. The results show that this polymer possesses the larger excited state absorption cross-section than the ground state, indicating that the OL performance of this polymer mainly arises from the reverse saturable absorption (RSA).

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