Optical phase conjugation and photoisomerization of novel polyester films functionalizied by nitroazobenzene with push pull structures
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摘要: 研究了2类以4'-(N,N二羟乙基)氨基4-硝基偶氮苯功能化的聚酯膜的光学相位共轭波的产生和光致异构。解释了聚酯膜产生饱和吸收和聚酯膜以顺式异构体的单线基态到单线激发态与反式异构体的单线基态到单线激发态的两个独立二能级系统通过光致异构耦合构成的四能级系统的响应特征。研究了膜厚、聚酯结构与泵浦光强对相位共轭波产生的影响。Abstract: The optical phase conjugation and photoisomerization of some films of two kinds of polyesters functionalizied by 4-bis(N,N hydroxyethylene)-imino-4-nitroazobenzene have been studied.The photoresponsive mechanism of these films was explained quite well by a model of four-level energy system,which was consisting of two pairs of siglet states of trans and cis isomers,respectively.Photoismerization was the main intramolecular relaxtion between both two-level energy systems.Investigation on effects of pump intensities,polyester structures and thicknees of films has been also carried out.
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