镧系氧化物光子晶体自组装与自发辐射调制

镧系氧化物光子晶体自组装与自发辐射调制 Self-assembly of Lanthanide Oxide Photonic Crystals and Its Modification on Spontaneous Emission 宋宏伟 SONG Hong-wei first-author 吉林大学集成光电子学国家重点实验室 电子科学与工程学院, 吉林 长春 130012 吉林大学集成光电子学国家重点实验室 电子科学与工程学院, 吉林 长春 130012 State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China 光子晶体是介电常数(折射率)随光波长大小周期性巨大变化的人工晶体。光子晶体的诞生使人类操控光子由梦想成为现实。光子晶体结构对置于光子晶体中的荧光客体自发辐射速率和荧光强度具有重要的调制作用。与半导体晶格对电子波函数的调制相类似,光子带隙材料能够调制具有相应波长的电磁波——当电磁波在光子带隙材料中传播时,由于存在布拉格散射而受到调制,电磁波能量形成能带结构。能带与能带之间出现带隙,即光子带隙。所具能量处在光子带隙内的光子,不能进入该晶体。本文将在综述这一领域国际上的重要研究进展基础上,重点介绍本课题组在镧系氧化物三维晶体的自组装与光子带隙对稀土离子自发辐射调制方面的研究成果。 The birth of the concept of photonic crystal (PC) makes the dream of manipulating photon become reality. Possessing spatial periodicity in their dielectric constant on the length scale of the optical wavelength, PCs behave with electromagnetic waves just like atomic crystals do with electrons. As an electronic band gap is created by the periodic arrangement of atoms in a semiconductor, the periodic electromagnetic modulation created by a PC can yield a photonic stop band (PSB), which has significant modification on the spontaneous radiative rate and emission intensity of the fluorescent guest implanted in the PCs. The modification of PCs on spontaneous emission is attracting current interests due to its considerable scientific and technological values. In this article, after highlight the international development on this field, on emphasis, we will introduce our recent results on the preparation of three-dimensional lanthanide oxide PCs through the self-assembly method and the modification of PCs on spontaneous emission of rare earth ions. 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