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光束的轨道角动量本征态可以构建高维Hilbert空间,将之应用于数据存储中,可以实现比传统方法更高的数据存储密度.提出了一种用光束轨道角动量实现高密度数据存储的方法,对存储区域进行相位编码,通过探测透射光束轨道角动量谱(螺旋谱)的特征来区分由相位编码形成的不同数据态.四台阶结构相位编码可以实现57个不同的数据态,有望将数据密度提高为传统方法的近6倍.
The orbit angular momentum eigenstates of the beam can construct high-dimensional Hilbert space, which can be used in data storage, and can achieve higher data storage density than the traditional method. A method of high-density data storage using beam orbit angular momentum Method to phase encode the storage area and to distinguish the different data states formed by the phase encoding by detecting the characteristics of the angular momentum spectrum (spiral spectrum) of the transmitted beam orbit.The phase encoding of the four-step structure can realize 57 different data states, Data density increased nearly 6 times the traditional method.