BASIC STUDY FOR SELF-INDUCED OPTICAL PULSE GENERATION USING RECURSIVE PHOTOCHROMATIC PROCESS

本研究的目的是开发利用递归光致变色工艺产生自激光脉冲。一般来说，生物被认为是一种优化的系统。将其有效地应用于工程中，开发出一种新型的环保功能材料是值得期待的。在这个项目中，光接受蛋白也存在于我们的眼睛。光感受性蛋白通过光的颜色的不同而改变形状（异构化）。通过一些异构化过程，它恢复到基的形式。以光感受蛋白的这种递归光学异构化为重点，研究了多色光环境下存在的现象，并关注其各种行为。为此，我们提出了一种利用光接受蛋白的递归光色过程来调制光的新方法。为了验证所提出的方法，我们采用“细菌视紫红质”作为光接受蛋白。通过实验验证，我们证实了所提出的方法在细菌视紫红质中成功地起作用。为了在该方法中充分利用细菌视紫红质的各种特性，我们对细菌视紫红质的这种从超快到慢速的递归光学异构化进行了深入研究。从本研究的结果中，我们可以获得重要的知识，有了这些知识，我们所提出的方法将成为生物材料应用的新途径（例如光脉冲产生）。

The objective of this research is development of self-induced optical pulse generation using recursive photochromatic process. In general, a living thing is considered to be a kind of the optimized system. Applying it in engineering effectively, development of a novel and eco-friendly functional material is expectable. In this project, the optical receptiveness protein which exists also in our eyes is taken up. Optical receptiveness protein changes the form by the difference in the color of light (isomerization). It returns to the form of a basis through the process of some isomerization. Focusing on this recursive optical isomerization of the optical receptiveness protein, the phenomenon under existence of the multi-caolor light as environment is examined paying attention to its various behavior.For the purpose, we have proposed the novel method for modulation of light using the recursive photochromatic process of optical receptiveness protein. To verify the proposed method, we adopted "bacteriorhodopsin" as an optical receptiveness protein. As a result of experimental verification, we confirmed that the proposed method function successfully in bacteriorhodopsin. To make a full use of various properties of bacteriorhodopsin in this method, we delved into the this recursive optical isomerization of bacteriorhodopsin from ultra-fast regime to slow one.From the results of this research, we can obtain the important knowledge, with which the proposed method would become a new approach for application of bio-materials (ex. optical pulse generation).