梯度结构胶体光子晶体的制备及光子禁带调节

摘要

以改进的对流自组装方法制备层数可控的胶体光子晶体,并通过各向同性氧等离子体(O2 Plasma)刻蚀构造出梯度结构,进一步通过金(Au)及无定形硅(Si)的可控沉积调节梯度结构胶体光子晶体的光子禁带,并将该梯度结构用于罗丹明B的荧光发射增强.%Colloidal photonic crystals with controllable layers were fabricated by improved convective self-assembly method, and isotropic O2 plasma etching was used to construct gradient structure. The gradient(a-long the surface normal) could be controlled by plasma treatment, leading to a wider tuning range of the stop band compared with colloidal photonic crystals without gradient. The photonic band gap (PBG) of the gradient colloidal photonic crystal was modified through controllable deposition of gold and amorphous silicon. Furthermore , a fluorescent molecule (Rhodamine B) was penetrated into the interstice of gradient colloidal crystals, and it exhibited an 8.6-fold enhancement of fluorescence emission. According to the tunable optical property of gradient colloidal photonic crystals(GCPCs) , they could be used in fields such as photonics, catalysis and life science.