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Simultaneous Reverse Saturable Absorption of Fluorinated Naphthalocyanines at 532 nd 1064 nm

机译:氟化萘酞菁在532和1064 nm处同时反向饱和吸收

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摘要

The series of (tert-butyl)catechol-substituted fluorinated naphthalocyanines 1, 2 and 3 displays limiting of the optical power generated with nanosecond light pulses simultaneously at 532 and 1064 nm. Limiting thresholds of 1-3 fall in the range 1.5-2.7 J cm~(-2) at 532 nm and 2.6-3.7 J cm~(-2) at 1064 nm when linear transmittance is 0.75 at both wavelengths of analysis. Compared to other unsubstituted naphthalocyanines, 1-3 show a relatively large window of high linear optical transmission between the characteristic Q- and B- absorption bands (above 0.75 for a 250 nm-wide window when 1-3 concentration is in the order of few millimoles per liter in 1 cm thick cells). A general enhancement of photostability in 1-3 is observed for the presence of electron-withdrawing fluorine substituents. The optical limiting effect produced by these systems is evaluated for the protection of optical sensors which operate in both visible and NIR spectral ranges, e.g. the human eye and night vision devices.
机译:(叔丁基)邻苯二酚取代的氟化萘菁1、2和3系列显示了同时在532和1064 nm处纳秒级光脉冲产生的光功率的限制。当在两个分析波长下线性透射率均为0.75时,极限阈值1-3在532 nm处在1.5-2.7 J cm〜(-2)范围内,而在1064 nm处在2.6-3.7 J cm〜(-2)范围内。与其他未取代的萘酞菁相比,1-3表示在特征Q带和B-吸收带之间具有较高线性光学透射率的相对较大的窗口(当1-3的浓度在几个数量级时,对于250 nm宽的窗口而言,大于0.75。 1厘米厚的小室中每升1毫摩尔)。对于存在吸电子的氟取代基,观察到了1-3中光稳定性的总体增强。对这些系统产生的光学限制效应进行了评估,以保护在可见光和近红外光谱范围内(例如在人眼和夜视设备。

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