Sequential Evolution of Colored Copper Surface Irradiated by Defocused Femtosecond Laser
Kaiwen Ding, Ming Li, Cong Wang, Nai Lin, Haoran Wang, Zhi Luo, Ji’an Duan
Abstract
Herein, an effective method is proposed for the fabrication of sequential colors on copper by adjusting femtosecond laser defocusing distance. The sequential evolution tendency of induced colors by adjusting laser defocusing distance is conducted. It is revealed that such a change of surface optical response is originated from the gradual evolution of three different kinds of structures. The angle‐resolved spectrum of the colored surface is investigated. In addition, the simultaneously derived hydrophobicity of the colored surface is explored.
Topics & Concepts
ColoredFemtosecondMaterials scienceCopperLaserOpticsIrradiationSurface (topology)FabricationComposite materialMetallurgyPhysicsMathematicsNuclear physicsPathologyMedicineAlternative medicineGeometryLaser Material Processing TechniquesPhotonic Crystals and ApplicationsOptical Coatings and Gratings