A periodic statistical potential applied in each layer of bilayer graphene can change it to a superlattice, enabling its application as a flexible light absorber. In this work, the effect of structural parameters on the optical absorption and bandgap of such a bilayer graphene superlattice is studied theoretically in detail. The bilayer graphene superlattice consists of two single layers of graphene with different patterns of static periodic potential applied. The role of the unit cell length, different ratios between the width of each region, and the magnitude of the applied potential in the optical absorption is analyzed in detail. The results reveal that the optical absorption can be enhanced by increasing the magnitude of the square static periodic potential applied to each single layer of graphene. The effect of light polarization is also addressed. It is observed that different ratios of the widths of periodic regions do not change the absorption, while the configuration and value of the square static periodic potential applied plays a crucial role in the absorption spectrum.

应用于双层石墨烯每一层的周期性统计电势可以将其更改为超晶格，从而使其可用作柔性光吸收剂。在这项工作中，理论上详细研究了结构参数对这种双层石墨烯超晶格的光吸收和带隙的影响。双层石墨烯超晶格由两层单层石墨烯组成，具有不同的静态周期性电势模式。详细分析了晶胞长度，每个区域的宽度之间的不同比率以及光吸收中施加电势的大小的作用。结果表明，可以通过增加施加到石墨烯的每个单层的平方静态周期性电势的大小来增强光吸收。还解决了光偏振的影响。观察到，周期性区域的宽度的不同比率不会改变吸收，而所施加的平方静态周期性电势的构型和值在吸收光谱中起关键作用。