Effects of doping on Optical Properties of Colloidal Crystals
High-quality Polystyrene（PS） colloidal crystal multilayers have been fabricated from aqueous solutions by the vertical deposition method at proper temperature and humidity. In addition, impurities have been introduced into these crystals by doping to break the periodic spatial variation of the dielectric index. This system provides a simple way to study 3D photonic band structure effects with complete control over impurities in the lattice. We have studied the effects of the size, number and dielectric index of substitutional doping of these colloidal crystals in the lattice and have observed the influence of the defects directly on the optical transmission spectra. The optical variation is due to structural modifications of the material caused by doping that do not imply a loss of order. Optical measurements fit well with the microstructure measurements. These may prove to be a significant advantage if control over sample impurity provides an avenue for tuning the optical properties.
Doping Colloidal crystal Optical properties
汪静 曲冰 潘超
大连水产学院理学院,大连116023;生物电子学国家重点实验室(东南大学),南京 210096 大连水产学院理学院,大连116023
国际会议
成都
英文
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）