BR_(D96N)光调制吸收增强现象的实验研究

Experimental study of enhancement of the light-modulated absorption of bacteriorhodopsin-D96N films

通过光谱响应特性实验和记录 /读出图像实验 ,研究了基因变异型细菌视紫红质 (BRD96N)分子膜对单色光的光调制特性 .发现BRD96N分子膜在 5 5 0nm— 6 0 0nm范围内对调制光有吸收增强的现象 ,且对此范围内不同波长的单色光其调制程度有差异 .利用曲线拟和方法发现 5 5 0nm— 6 0 0nm吸收增强的变化过程分为快过程和慢过程 ,其对应的时间常数分别为 30s和 5min.利用强度调制器的吸收强度与图像灰度之间的关系 ,分析了 5 6 0nm— 6 0 0nm范围内出现图像反转的实验现象 .

In this paper, the light-modulated characteristics of the gene-variant bacteriorhodopsin-D96N molecule film are studied by spectrum response experiment. The absorption enhancement phenomena of BR D96N films at 550—600nm modulated light wavelength are gained, and there are different absorption changes at different monochromatic wavelengths. Using curve-fitting method, it is found that the process of the absorption change includes fast and slow responses with time constants of 30 s and 5 min respectively. Applying the relations between the absorption change and gray-scale image to the write-readout image experiment, the reverse image phenomena in a wavelength range of 550—600nm are analyzed.