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Optical limiting of pentaazadentate metal complexes for picosecond pulses in solution

机译:溶液中皮秒脉冲的五氮杂齿金属配合物的光学限制

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The optical-limiting performances for four pentaazadentate metal complexes in tetrahydrofuran have been measured at 532 nm for 35-ps pulses, in which reverse saturable absorption from the singlet-singlet excited states should be responsible for the limiting mechanism. The excited-state parameters are calculated according to a six-level model. The limiting threshold at T/T_(0)=0.5 is 44 mJ/cm~(2), and the throughput is limited to 27 mJ/cm~(2) as incident fluence reaches 0.35 J/cm~(2) for carboxyl pentaazadentate cadmium. The limiting thresholds and the throughput values are strongly influenced by peripheral substituents and central metal ions of the complexes.
机译:在532 nm下对35 ps脉冲测量了四氢呋喃中四种五氮杂齿金属配合物的光学限制性能,其中来自单重态-单重态激发态的反向饱和吸收应是限制机制。根据六级模型计算出激发态参数。在T / T_(0)= 0.5时的极限阈值为44 mJ / cm〜(2),并且当羧基的入射通量达到0.35 J / cm〜(2)时,通量限制为27 mJ / cm〜(2)。五氮杂齿状镉。极限阈值和通量值受配合物的外围取代基和中心金属离子的强烈影响。

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