PMMA基底CdSe量子点光纤材料的制备及其光谱

Preparation and Spectra of CdSe-Quantum-Dot-Doped PMMA Fiber Materials

塑料光纤在成本、光纤到户和短距离通信等方面与石英光纤相比具有优越性。在塑料光纤基底中掺入某些光放大介质(如量子点),可以制备出塑料光纤放大器。目前,对于量子点掺杂的塑料光纤材料的光学性能的研究还很少。报导了一种以聚甲基丙烯酸甲酯(PMMA)为基底的CdSe量子点光纤材料CdSe/PMMA。紫外-可见-近红外吸收谱以及荧光辐射谱测量表明,制备的CdSe量子点的尺寸单分散性较好,CdSe/PMMA的发射峰比CdSe的发射峰宽,其半峰全宽加宽了约10 nm。在波长为473 nm的激光持续照射下,CdSe/PMMA的荧光辐射强度不断增强,约12 h后发光强度趋稳,峰值强度增加约1倍,同时,荧光峰值波长出现蓝移,约25 nm,没有回复现象。由于CdSe/PMMA具有强荧光辐射和宽光谱的特点,因此有可能是一种较为理想的宽光谱光纤基底材料。

Plastic fiber has advantages over the conventional quartz fiber on respect of cost,fiber to the home application and short-distance communications.The plastic fiber amplifier can be gotten by doping the optical gain media such as quantum dots（QD） into plastic fiber.However,there is few study reported on the QD-doped plastic fiber.CdSe QD doped PMMA fiber material（CdSe/PMMA） is prepared.The UV-vis-near-infrared spectrum shows a narrow-size distribution of the CdSe QD in the CdSe/PMMA.The photoluminescence（PL） spectrum of the CdSe/PMMA is widen（about 10 nm） compared with the plain CdSe QD.Irradiated by a 473 nm laser for about 12 h,the PL peak intensity of the CdSe/PMMA is enhanced（about 1 time）,and the peak wavelength shows a blue shift with 25 nm.Obtained results suggest that the CdSe/PMMA may be available fiber materials used as broadband amplifiers in the future.