罗丹明6G掺杂PDLC的光电特性
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陶卫东(1969-),男,浙江宁波人,博士,教授,硕士生导 师,主要从事光学与光电子方面的研究.

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国家自然科学基金(61078060)资助项目 (1.宁波大学 理学院,浙江 宁波 315211; 2.宁波大学 信息学院,浙江 宁波 315211)


Study on electro-optical characteristics of the PDLC doped with Rhodamine 6G
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    摘要:

    将罗丹明6G(Rh6G)溶入到PDLC中,制备出一种可激 发荧光的荧光-聚合物分散液晶薄膜。分别对普通PDLC和荧光-PDLC透射谱在可见光范围内 进行了测试,与普通PDLC相比,荧光-PDLC透射谱在535nm附近存在 1个吸收峰,并且透射 光强在550~580nm波段急剧增大。实验给出了罗丹明6G溶液的吸收 谱和发射谱,从而证 实了掺入的罗丹明6G分子是导致上述差异的原因。为了进一步研究荧光-PDLC的光电特性, 在λ=532nm绿激光 照射下,对荧光-PDLC薄膜透射光随角度-电压的变化进行了测试。结果表明,透过的绿光 与激发的荧光随角度的变化呈现不同电压调制规律。散射角在0°~4°范围内,绿光光强随 电压的增加而增加;散射角在5°~26°之间,绿光光强随电压的增 大先增大后减小;当散 射角大于27°时,绿光光强随电压增加一直减小;然而荧光光强随电 压的增加一直减小,且服从高斯分布。

    Abstract:

    A fluorescent polymer dispersed liquid crystal (fluorescent-PDLC) film was prep ared by adding the Rhodamine 6G to PDLC.By testing the transmission spectra of PDLC film and fluore scent-PDLC film in the vis ible range,it is found that the absorption peak is around 535nm and the light i ntensity increases dramatically in the region from 550nm to 580nm in the trans mission spectrum of fluorescent-PDLC film compared with the pure PDLC film.The absorption spectrum and emission spectrum of Rhodamine 6G are provided to confir m t hat the above-mentioned difference is caused by the introduction of Rhodamine 6G.To further investigate the electro-optical characteristics of fluorescent-PD LC film,transmission spectra of fluorescent-PDLC films with different angles an d voltages are measured upon green laser irradiation (λ =532nm).The results show that the transmitted green and fluorescent light bea ms with different angles obey different voltage regulation rules.When the scatte ring angle is from 0° to 4°,the light intensity of the green light increases with the voltage increase.Ranging from 5° to 26°,the light intensity of the green light first increases and then decreases with the voltage increase.After the degree of 27°,the light intensity of the gree n light decreases with the voltage increase.However,the light intensity of the f luorescence decreases with the increase of voltages,and it is subject to Gauss ian distribution.

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赵云,潘雪丰,董建峰,陶卫东.罗丹明6G掺杂PDLC的光电特性[J].光电子激光,2013,(2):287~291

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  • 收稿日期:2012-08-09
  • 最后修改日期:2012-09-16
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