Polarization holography has been extensively applied in many fields, such as optical science, metrology, and biochemistry, due to its property of polarization modulation. However, the modulated polarization state of diffracted light corresponds strictly to that of incident light one by one. Here, a kind of tunable polarization holographic grating has been designed in terms of Jones matrices, and intensity-based polarization manipulation has been realized experimentally. The proposed tunable polarization holographic grating is recorded on an azobenzene liquid-crystalline film by a pair of coherent light beams with orthogonal polarization states and asymmetrically controlled intensities. It is found that the diffracted light can be actively manipulated from linearly to circularly polarized based on the light intensity of the recording holographic field when the polarization state of incident light keeps constant. Our work could enrich the field of light manipulation and holography.

中文翻译：

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通过改变记录光束的强度比获得可调谐偏振全息光栅

偏振全息术由于其偏振调制特性，在光学科学、计量学、生物化学等领域得到了广泛的应用。然而，衍射光的调制偏振态与入射光的偏振态严格一一对应。这里，根据琼斯矩阵设计了一种可调谐偏振全息光栅，并通过实验实现了基于强度的偏振操纵。所提出的可调谐偏振全息光栅通过一对具有正交偏振态和不对称控制强度的相干光束记录在偶氮苯液晶薄膜上。研究发现，当入射光的偏振态保持恒定时，可以根据记录全息场的光强度主动将衍射光从线偏振控制为圆偏振。我们的工作可以丰富光操纵和全息术领域。