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在线偏振飞秒激光激发下,菌紫质通过双光子光化学反应可以生成具有永久光致各向异性的蓝移产物F540态.基于F540态的永久光致各向异性,通过调控飞秒激光空间光场分布,可以在菌紫质薄膜中实现永久光信息存储.本文使用纯相位型空间光调制器调制飞秒激光光场,在物镜焦平面上生成光学点阵图案,可以将信息快速记录在菌紫质薄膜中.同时,通过改变入射激光偏振方向,可以实现偏振复用光存储,这在高密度光存储和数据加密领域具有潜在应用.
Under the condition of on-line polarized femtosecond laser excitation, the bacteriorhodopsin can generate a permanent photo-anisotropic blue-shifted product F540 through two-photon photochemical reaction. Based on the permanent photo-anisotropy of the F540 state, Field distribution, the permanent light information can be stored in the bacteriorhodopsin film.In this paper, the pure phase spatial light modulator is used to modulate the femtosecond laser field to generate the optical lattice pattern on the focal plane of the objective lens, which can rapidly record the information in the bacteria In the meantime, by changing the polarization direction of the incident laser, polarization-multiplexed optical storage can be realized, which has potential applications in the field of high-density optical storage and data encryption.