【作者】 褚光； 屈丹； 姜海晶； 王宇； 徐雁；

【Author】 Guang Chu;Dan Qu;Haijing Jiang;Yu Wang;Yan Xu;State Key Lab of Inorganic Synthesis and Preparative Chemistry,Jilin University;

【机构】 吉林大学无机合成与制备化学国家重点实验室；

【摘要】 将稀土荧光纳米粒子组装成具有手性结构的光子晶体将会调制它们的光学性质。我们利用手性向列型介孔二氧化硅作为模板,通过硬模板浇筑法首次成功的构筑出掺杂稀土离子的手性液晶氧化物自支撑膜[1-2]。这些手性液晶膜具有一维光子晶体周期性结构、介孔、高比表面积以及可调控的光子带隙等优异特性。它们显示出选择性抑制稀土离子自发发射,调节在不同偏振光激发下自发发射随光子晶体各向异性变化的特性。这些掺杂稀土离子的手性液晶无机氧化物自支撑膜在新型光学传感材料领域具有广阔的应用前景。更多还原

【Abstract】 Incorporation of luminescent rare earth nanoparticles and chirality into photonic crystals could modulate their optical properties. We describe the fabrication of rare earth doped chiral nematic oxides free-standing films by a hard-templating approach. These chiral nematic films have one-dimensional photonic crystal structure, mesoporosity, high BET surface area and tunable photonic band gap. They exhibit selective suppression of the spontaneous emission of the Eu3+ ions, and the capability to modulate the spontaneous emission under different polarization state. This phenomenon is attributed to the chiral nematic organization of the nanoparticles that leads to a strong anisotropy. The integration of chiral nematic structure with the luminescent rare earth ions renders unique luminescent properties that are potentially useful in the design of new optical devices.更多还原