形状记忆光子晶体对发光的可逆调控及图案化

Reversible Modulation of Luminescence and Patterning Performances Ena-bled by Shape Memory Photonic Crystals

摘要:

光子晶体是一种介电常数周期性排列的人工晶体，得益于其能带结构，光子晶体能够对荧光物质的发光进行调控。本文以质量比为1：5的聚乙二醇（600）双丙烯酸酯（PEGDA）和四官脂肪族聚氨酯丙烯酸酯（PUA）构建了共聚物体系，使用去模板法制备了形状记忆反蛋白石光子晶体（SMPCs），考察了SMPCs对荧光客体发光的调控。结果表明：这种SMPCs对荧光素染料的发光抑制效果达到83%，同时由于共聚物的塑性形变，材料表面能够进行压力编译及温度触发恢复。利用上述特性，SMPCs光子晶体微结构能够进行可逆转变，进而实现了对荧光客体发光的可逆调控。在材料表面完成了数字图章、100μm光栅和50×50μm点阵掩模版的图案化处理，在不同光学条件下能够呈现出不同的图案化状态。

Abstract:

Photonic crystals are artificial crystals whose dielectric constant varies periodically as the light wave-length. Benefited from the band structure, photonic crystal can modulate the luminescence of fluorescent materials. We prepared Shape memory photonic crystals (SMPCs) through de-template method con-structed by polyethylene glycol (600) diacrylate (PEGDA) and tetrafunctional aliphatic polyurethane acrylate (PUA) copolymer system with a mass ratio of 1:5, then investigated the effect of SMPCs on the luminescence of fluorescent objects embedded in it. The results showed that the SMPCs had a lumines-cent inhibition effect of 83% on fluorescein dyes. Due to the plastic deformation of copolymer, this SMPCs has good pressure compilation and temperature trigger recovery performance. Based on features mentioned above, SMPCs can carry out reversible transformation between diverse microstructures, and then realize the reversible modulation of luminescence. After patterning technic on the surface with digi-tal stamp, 100μm grating and 50×50μm dot matrix photomask, the devices will present diverse patterns under different optical conditions.