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作为一种有可能作为永久信息存储的材料,合成出一种新的双偶氮材料(BA1)。当样品被波长为532nm的光激发时,几乎大部分BA1分子从反-反态转化到顺-顺态,产生了光致双折射。因此,研究了BA1分子掺杂的PMMA薄膜的光致双折射和透过信号与入射光强度的关系。实验结果表明:透过信号强度随着泵浦光的增强而增强。通过偏振态互相平行(SS)和垂直(SP)的两束偏振光用来研究偏振全息存储,结果表明SP光栅形成的衍射信号要比SS光栅的衍射信号强很多。
A new disazo material (BA1) was synthesized as a possible storage of permanent information. When the sample is excited by light having a wavelength of 532 nm, almost the majority of the BA1 molecules change from trans-trans state to cis-cis state, resulting in photo-induced birefringence. Therefore, the relationship between the photoinduced birefringence and transmission signal of the BA1 -doped PMMA films and the incident light intensity has been studied. Experimental results show that the transmitted signal intensity increases with the pump light intensity. The polarization holographic storage was studied by polarization of two beams of light polarized parallel to each other (SS) and vertical (SP). The results show that the diffraction signal from the SP grating is much stronger than the diffraction from the SS grating.