熔锥光纤渐逝波光场吸附半导体量子点技术研究  

Research on the Technique of Optical Trapping Semiconductor Quantum-Dots Based on the Evanescent Field of Tapered Optical Fiber

作　　者：商娅娜[1,2] 石庆鹏[1,2] 庞拂飞[1,2] 倪晴燕 陈振宜[1,2] 王廷云[1,2] 

机构地区：[1]上海大学特种光纤与光接人网省部共建重点实验室,上海200072 [2]上海大学通信与信息工程学院,上海200072

出　　处：《中国激光》2015年第2期167-171,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(61205172,61275090,61227012)

摘　　要：基于渐逝波光场对微纳粒子具有光吸附力的效应,提出了利用熔融拉锥光纤吸附沉积半导体量子点的实验研究。以波长为980 nm的激光作为光源,在熔融拉锥光纤表面成功吸附沉积了高密度硫化铅(Pb S)量子点薄膜。通过光抽运,在吸附沉积Pb S量子点的熔锥光纤中观测到Pb S量子点光致发光光谱,并实现了在1550 nm波段的光放大,增益达6.8 d B。Based on the optical trapping micro-and nano-particles effect of the evanescent field, we propose to investigate the optical trapping technique for semiconductor quantum dots by using tapered optical fiber. With the laser at 980 nm wavelength as light source, the PbS quantum dots （QDs） are absorbed and deposited on the surface of the tapered fiber successfully. By optical pumping, the photoluminescence from the tapered fiber after trapping PbS QDs is observed, and a gain of 6.8 dB is obtained at 1550 nm wavelength band.

关 键 词：量子光学 量子点薄膜 光学吸附 锥形光纤 渐逝波场 

分 类 号：TN253[电子电信—物理电子学]