【摘要】 阐述了利用细菌视紫红质薄膜 (BR薄膜 )优良的非线性光学特性作为光寻址的空间光调制器的实验研究 .BR有两个重要的光敏中间态 (B态和M态 ) ,其吸收带 (B态吸收峰为 5 70nm ,M态吸收峰为 4 12nm)重叠区域较少 ,利用其正向 (B→M)和逆向 (M→B)光反应之间转化关系和B态与M态的差异吸收实现了相干光学图像到非相干光学图像的转换实验 .采用经基因改性的细菌视紫红质薄膜 (BRD96N)材料 ,使用 6 70nm相干光作为写入光 ,5 30nm非相干光作为读出光 ,得到了分辨率约为 2 0 0lines mm ,对比度约为 2 .1∶1的实验结果 .更多还原

【Abstract】 An optically addressed spatial light modulator (OA SLM) is presented by using the excellent nonlinear optical characteristics of bacteriorhodopsin films (BR films). The BR films have two dominant photoactive states (B state and M state) which have well separated absorption bands with maxima of B state at 570nm and M state at 412nm. Using the ratio of the shift between the forward (B→M)and backward(M→B)photoreactions, the experimental study on the conversion of coherent to incoherent image is realized on BR films. Using the genetic manipulation of the BR D96N film as a sample, the 670nm coherent light as a writing light and the 530nm incoherent light as a readout light, the experimental results for the resolution of ～200 lines/mm and the contrast of about 2.1∶1are achieved.更多还原