实时全息微结构制作的计算机仿真与设计

激光全息是制作光子晶体微结构的重要方法,为便于调节参数以提高实验成功率,提出利用CMOS传感器代替传统的记录材料全息干板,将全息干涉形成的微结构实时输入计算机处理。根据多光束干涉原理探讨了实现二维微结构的光束配置和设计原则,结合计算机数值仿真讨论了光束偏振对微结构"原子"形状的影响。进一步设计实验进行验证,结合实时显示技术方便、灵活调节各光束参数,获得了三角晶格和正方晶格两类典型的微结构。实验结果表明,计算机的实时显示技术有助于提高微结构的设计和制作效率。

Computer Simulation and Design of Real-time Holographic Fabrication of Microstructures

Laser holography is an important method for fabricating photonic crystal microstructures. In order to facilitate adjusting beam parameters to improve the success rate of experiment, it is proposed to transfer the formed microstructure to a computer for real-time display and processing by using a CMOS sensor. According to the principle of multi-beam interference, the beam configurations and design principles of the realization of 2D microstructures are explored. Combining with numerical simulations, the influence of the beam polarizations on the shapes of the formed microstructure “atom” is also discussed. Further experiments validate the designs. With the help of the convenient real-time display and flexible adjusting of the beam parameters, two kinds of microstructures,i.e., the triangular and square lattices,are obtained. Experimental results show that the real-time computer display technology is helpful to improve the efficiency of design and fabrication of microstructures.