[BR-D96N胶片的全息记录特性]。

Yuan Zheng, Bao-Li Yao, Ying-Li Wang, Ming Lei, Neimule Menke, Guo-Fu Cheng, Norbert Hampp
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摘要

BR- d96n是细菌视紫红质(BR)的基因突变产物,具有明显改善的光致变色效果。与野生型BR相比,BR- d96n的M态寿命延长至5 min,表现出明显的饱和吸收,饱和吸收光强较低(0.4 mW/cm(2))。在全息记录情况下,动态光栅记录在BR-D96N薄膜上,其特征参数不是光曝光能量,而是光强。全息光栅的写入时间与记录光强有关。记录光的强度越高,光栅形成的速度就越快。在弱重构光下,衍射效率最大的记录光强与饱和吸收光强一致。重建光可以部分擦除光栅。较低的重构光强度可获得较高的衍射效率(1.8%),但衍射强度不高。为了获得最高的衍射强度,需要适当高强度的重构光(80微米/厘米(2))。实验结果表明,BR-D96N胶片上可以记录全息图像。
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[Holographic recording properties of BR-D96N film].

BR-D96N was a genetically mutated product of bacteriorhodopsin (BR) with obvious improved photochromic effect. Compared with the wild type BR, BR-D96N had a lifetime of M state prolonged to 5 min, showing obvious saturation absorption and lower light intensity in saturation absorption (0.4 mW/cm(2)). In case of holographic recording, dynamic grating was recorded in the BR-D96N film, its characteristic parameter was not light exposure energy but light intensity. The writing time of the holographic grating depended on the recording light intensity. The higher the recording light intensity, the faster the grating builds up. Under a weak reconstruction light, the recording light intensity resulting in maximal diffraction efficiency was consistent with the saturation absorption intensity. The reconstruction light could partly erase the grating. With lower intensity of reconstruction light, higher diffraction efficiency (1.8%) could be reached, but the diffraction intensity was not high. To get highest diffraction intensity, a properly high intensity of reconstruction light was needed (80 microW/cm(2)). The result of these experiments showed that holographic images could be recorded on the BR-D96N film.

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