两种钌配合物皮秒发光动力学过程研究

采用稳态发光光谱、瞬态发光动力学测量等手段,对两种钉配合物[Ru(bpy)3](ClO4)2和[Ru(bpy)2 HPIP](ClO4)2的发光性质进行了研究.稳态发光光谱表明[Ru(bpy)2 HPIP](ClO4)2发光明显偏弱;皮秒瞬态发光动力学测量显示[Ru(bpy)2 HPIP](ClO4)2的激发态弛豫过程...     

Spectra of spontaneous Raman scattering in taper-drawn micro/nano-fibers

We study the spontaneous Raman scattering(RS) in taper-drawn micro/nano-fibers(MNFs) by employing the photon counting technique. The spectra of RS in five MNFs, which are fabricated by using different heating flames(hydrogen flame or butane flame) and with different diameters, are measured within a frequency shift range of 1435 cm~(-1)–3200 cm~(-1).From the measured spectra, we observe the RS peaks originated from silica and a unique RS peak with a frequency shift of ~ 2905 cm~(-1)(~ 87.2 THz). Unlike the former ones, the latter one is not observable in conventional optical fibers.Furthermore, the unique peak becomes obvious and starts to rapidly increase with the decrease of the diameter of MNFs when the diameter is smaller than 2 μm, and the intensity of the unique peak significantly depends on the heating flame used in the fabricating process. Our investigation is useful for the entanglement generation or optical sensing using taper-drawn MNFs.