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Metal Colouring with Femtoscond Laser Pulses

Author: JiXingGuo
Tutor: LinJingQuan
School: Changchun University of Science and Technology
Course: Optics
Keywords: Femtosecond laser Metal coloring Laser-induced periodic surface structure Absorption Rate
CLC: TN249
Type: Master's thesis
Year: 2011
Downloads: 83
Quote: 0
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Abstract


The thesis using femtosecond laser Preparation of micro-and nano- structure on the surface of the metal aluminum by pointing irradiation and scanning irradiation in two ways . Irradiation experiments in the fixed-point femtosecond laser-induced periodic surface structure and the use of scanning electron microscope after irradiation aluminum surface structure . Pulse energy , pulse number of the formation of the microstructure of the aluminum surface . Femtosecond laser surface plasmon interference theory of the formation mechanism of periodic micro-nano structure , the use of the theory of two-temperature model to simulate the spatial distribution of electron energy femtosecond laser irradiation after aluminum surface . Scanning irradiation experiments , the femtosecond laser pulses to scan the surface of the aluminum to form a grating structure aluminum surface can be rendered as black , gray and gold , and by controlling the experimental parameters . Femtosecond laser irradiation after the aluminum surface absorption rate measurements showed that the black aluminum 8μm-25μm band optical absorption rate of up to 85% -95 % . Using color optical theory to explain the metal surface color change , from the microscopic analysis of the aluminum sample optical characteristic change mechanism .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Laser technology, the maser > Laser applications
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