菌紫质分子膜超高密度光信息存储的研究

Bacteriorhodopsin (BR) is the key protein found in the cell membrane of.Halobacterium salinarium. On the absorption of light energy, BR undergoes a very complex photocycle characterized by several spectroscopically distinct. A number of investigations describing BR′s uses in applications were recently reported. The significant feature of this biomaterial derives from the potential of modifying the protein’s photochromic properties through chemical enhanced or genetic manipulation of the native protein. BR shows an exceptional stability towards chemical, thermal, and photochemical degradation. The photochromic properties of BR provide the.possibility of many applications in optical information processing and storage. Based on our studies of the photonic properties of BR, A new concept of “Mole-Photonic Devices” is given for the first time. In this project, the characteristics of BR and its behavior of the writing, reading and erasing of the information in BR film are investigated. For permanent optical storage applications an intermediate state occurs with a lifetime of years is needed. A.system of three-wavelength EDRAW (Erase Direct Read After Write) was setup..Optical data was written into BR film with 670nm using the O to P photochemistry..The resulting data was nondestructively read out at 594nm using differential.absorption of B and P states. And the information have been erased with 490nm using the reconversion of the photoproduct state P. The result of long-term formation.stroage in BR films more than 1 years is obtained.As a kind of molecule material, BR provides the possibility of superhigh-density storage. The method of super-high density optical information storage (SDOIS) of BR using near-field scanning optical technology (NSOT) is proposed in this article. The experimental system of super-high density optical storage of BR is implemented by using NSOT and multi-wavelength optic fiber coupling technology (MWFC). The remarkable optical storage characters of BR in the near field is observed in this experiment.Based on study of the nonlinear optical properties and mechanism of complementary suppression-modulated transmission of BR, a novel optical switches device and a photonic logic gate device of BR was designed. And five basic binary.logic operations were implemented. BR has shown great promise as a candidate.material for optical storage and information processing applications

在信息科技飞速发展的今天，对超高密度信息存储的需求甚为迫切，现行的存储介质由于其自身性能而受到很大限制，菌紫质分子膜以其优良光致色变性能及作为分子器件在光存储领域深具应用前景。研究菌紫质光致变色特性和光存储特性，研制高性能菌紫质分子光存储器件，开展超高密度光信息存储技术的研究，具有重要的科学意义和商业应用前景。