大阪大学大学院工学研究科的增原教授组发现用脉冲宽为 10 0 fs的激光照射有机电致发光材料 ,可以出现阶梯状带有层差的直径为 0 .1mm的凹陷。阶梯的层数和激光的强度成正比 ,阶梯每层的涂度是固定的 ,率一层为 2 70 nm,第二层为 4 80 nm,第三层为 690 nm,第四层为 82 0 nm。可 Osaka University Graduate School of Engineering, Professor Zeng Yuan group found that with a pulse width of 10 0 fs laser irradiation of organic electroluminescent material, there can be stepped with a layer of the diameter of the hole is 0.1 mm in diameter. The number of layers in the ladder is proportional to the intensity of the laser. The coating on each layer of the ladder is fixed with a rate of 2 70 nm for one layer, 4 80 nm for the second layer, 690 nm for the third layer, and 82 0 for the fourth layer nm. can