PL3140 皮秒Nd:YLF激光器

Sum frequency generation vibrational spectroscopy was used to determine the orientation of the cations in a room-temperature ionic liquid at the air-liquid interface. The ionic liquid that was studied was 1-butyl-3- methylimidazolium bis-trifluoromethylsulfonimide, [BMIM]+[imide]-. The orientation of the cation, [BMIM]+, was studied as a function of water pressure in the vapor over the range of 10-5 to 200 Torr. At water pressures below 10-4 Torr, the imidazolium ring was oriented parallel to the surface plane. On increasing the water pressure to greater than 10-4 Torr, the imidazolium ring tipped up from the surface with an angle along the surface normal of 40-55°. No water signal was observed in the spectra obtained at the water pressures studied here.

Air-aqueous sodium halide solution interfaces are examined using vibrational sum frequency generation(SFG) spectroscopy. Raman and ATR-FTIR (attenuated total reflection Fourier transform infrared) spectroscopies are also used to compare the effects of halide anions on the water structure of the bulk solution to that of the interface. The interfacial water structures for the sodium fluoride and chloride aqueous solutions are found to be similar to the air-water interface, whereas sodium bromide and iodide aqueous solutions cause significant distortion of the hydrogen-bonding network. Analysis of the spectra indicates higher concentrations of bromide and iodide anions in the interfacial region with an increase in interfacial depth.

采用Ekspla公司的Atlantic型号工业级皮秒激光器，利用266nm输出，进行了有机小分子量子点发射的在线光致图案生成的研究

采用立陶宛EKSPLA生产的PL3140型10皮秒脉冲宽度，351nm波长的激光作光源激掺杂CI的CuI样品。用条纹相机测量样品近边带光发射的衰减弛豫时间。结果表明CI掺杂可以有效提高增强近边带发射强度，同时不影响其快速衰减特性。有助于研发快速响应闪烁体材料。