其他理化分析检测 | 氟苯并芴核心聚合物作为低阈值高增益放大介质-北京欧兰科技发展有限公司

方案摘要

方案下载

应用领域	石油/化工
检测样本	其他
检测项目	理化分析
参考标准	暂无

采用Ekspla公司NT342型号纳秒可调谐激光器，对氟苯并芴核心聚合物作为低阈值高增益放大激光介质的可行性进行了研究。

方案下载

配置单

Ekspla NT340 高能量可调谐激光器（OPO）
型号：NT340

¥50万 - 100万
咨询

方案详情

Deliberate control of intermolecular interactions in fluorene- and benzofluorene-cored oligomers
was attempted via introduction of different-length alkyl moieties to attain high emission amplification
and low amplified spontaneous emission (ASE) threshold at high oligomer concentrations.
Containing fluorenyl peripheral groups decorated with different-length alkyl moieties, the oligomers
were found to express weak concentration quenching of emission, yet excellent carrier drift
mobilities (close to 102 cm2/V/s) in the amorphous films. Owing to the larger radiative decay
rates (>1.0109 s1) and smaller concentration quenching, fluorene-cored oligomers exhibited
down to one order of magnitude lower ASE thresholds at higher concentrations as compared to
those of benzofluorene counterparts. The lowest threshold (300W/cm2) obtained for the fluorenecored
oligomers at the concentration of 50 wt % in polymer matrix is among the lowest reported
for solution-processed amorphous films in ambient conditions, what makes the oligomers promising
for lasing application. Great potential in emission amplification was confirmed by high maximum
net gain (77 cm1) revealed for these compounds. Although the photostability of the
oligomers was affected by photo-oxidation, it was found to be comparable to that of various organic
lasing materials including some commercial laser dyes evaluated under similar excitation
conditions.

上一篇在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位

下一篇采用选择性滤波增强光声层析测量对象的成像质量

文献贡献者

北京欧兰科技发展有限公司

金牌会员丨第17年

查看全部资料