Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400 085, India.
Chemphyschem. 2010 Oct 25;11(15):3333-8. doi: 10.1002/cphc.201000532.
A water-based narrow-band high-efficiency dye laser was designed by means of a supramolecular host-guest chemical approach. The lasing characteristics of rhodamine B and sulforhodamine B (Kiton Red S) dyes in aqueous solution with the macrocyclic host cucurbit[7]uril (CB7) as additive were investigated in a narrow-band dye laser setup. Significant improvements in both photostability and thermo-optical properties of the aqueous CB7-complexed dye systems were observed as compared to the uncomplexed dyes in ethanol solution. The tuning curves for the new dye-CB7-water systems were constructed by measuring the laser output at different wavelengths, which showed similar peak efficiencies and red-shifted gains compared to the ethanolic solutions of the dyes, while dye laser operation revealed comparable pump threshold energies and slope efficiencies. The combined results render the dye-CB7-water system an attractive active medium for high-repetition rate dye laser operation.
一种基于水的窄带高效染料激光器是通过超分子主客体化学方法设计的。在窄带染料激光装置中，研究了以大环主体葫芦[7]脲（CB7）为添加剂的水溶液中罗丹明 B 和磺基罗丹明 B（Kiton Red S）染料的激光特性。与乙醇溶液中的未络合染料相比，水合 CB7 络合染料体系的光稳定性和热光性能均有显著提高。通过测量不同波长的激光输出，构建了新的染料-CB7-水体系的调谐曲线，与染料的乙醇溶液相比，其峰值效率和红移增益相似，而染料激光的工作则显示出可比的泵浦阈值能量和斜率效率。综合结果表明，染料-CB7-水体系是一种很有吸引力的高重复率染料激光工作的活性介质。
