Calzado Eva M, Villalvilla José M, Boj Pedro G, Quintana José A, Gómez Rafael, Segura José L, Díaz García María A
Departmento de Física Aplicada and Instituto Universitario de Materiales de Alicante, Universidad de Alicante, 03080-Alicante, Spain.
Appl Opt. 2007 Jun 20;46(18):3836-42. doi: 10.1364/ao.46.003836.
The presence of amplified spontaneous emission (ASE) by optical pump in polystyrene films doped with N,N'-di(10-nonadecyl)perylene-3,4:9,10-tetracarboxylic diimide (PDI-N) in a range of PDI-N concentrations between 0.25 and 5 wt. % is reported. Gain coefficients up to 10 cm(-1), at a pump intensity of 74 kW/cm2, were obtained. The lowest thresholds (approximately 15 kW/cm2) and largest photostabilities measured at 50% (approximately 50 min, i.e., 30,000 pump pulses) were obtained for concentrations up to 1 wt. %. The observation of an increase in the ASE threshold and a decrease in the photostability for larger concentrations is attributed to the presence of aggregated species.
据报道，在掺杂了N，N'-二（10-十九烷基）苝-3,4:9,10-四羧酸二酰亚胺（PDI-N）的聚苯乙烯薄膜中，当PDI-N浓度在0.25至5 wt.%范围内时，通过光泵浦会出现放大自发辐射（ASE）现象。在泵浦强度为74 kW/cm2时，获得了高达10 cm-1的增益系数。对于浓度高达1 wt.%的情况，获得了最低阈值（约15 kW/cm2）以及在50%（约50分钟，即30,000个泵浦脉冲）时测得的最大光稳定性。对于更高浓度时ASE阈值增加和光稳定性降低的观察结果归因于聚集物种的存在。
