利用时域有限差分（FDTD）法，对12重准晶光子晶体（PQCs）的绝对带隙特性进行研究。主要讨论了加工过程中产生的尺寸误差和位置误差对12重PQCs绝对带隙的影响，并估算当前加工该带隙材料的能力。数值模拟结果表明，在相同误差条件下，尺寸误差大于位置误差对绝对带隙的影响；12重PQCs绝对带隙特性主要受TE模对加工误差敏感程度的限制；绝对带隙宽度随晶格常数的减小而逐渐变窄，当晶格常数不小于500 nm时，加工误差对绝对带隙的影响可忽略，而当晶格常数小于200 nm时，绝对带隙甚至完全消失。

Effect of fabrication error on the absolute bandgap of two-dimensional 12-fold photonic quasicrystals (PQCs) is numerically investigated by using the finite difference time domain (FDTD) method. Results indicate that, i) the effect of the size error is bigger than that of the position error; ii) the absolute bandgap is more sensitive to the bandgap of TE mode than its TM mode; iii)the bigger the fabrication error, the narrower the absolute bandgap of 12-fold PQCs is. In the current fabrication conditions, the effect of the fabrication error can be almost ignored for the 12-fold PQCs which lattice constant is bigger than 500 nm. However, if lattice constant of 12 PQCs is less than 200 nm, its absolute bandgap even disappear completely and cannot be used as absolute bandgap materials.