研究目的
Investigating the features of surface structuring on transparent material by laser-induced microplasma and measuring its intensity.
研究成果
The study demonstrated that laser-induced microplasma can effectively structure the surface of fused silica. The depth of micro-relief and micro-track was found to be dependent on the laser power, repetition rate, and scanning speed. The intensity of the microplasma correlates with the depth of the micro-relief, indicating its role in the ablation process.
研究不足
The study is limited by the complexity of the mechanisms involved in micro-relief formation, which are dependent on multifactor processes. The saturation of micro-relief depth after a certain number of pulses also poses a limitation for applications requiring deeper structures.
1：Experimental Design and Method Selection:
The study utilized a nanosecond pulsed fiber ytterbium laser to induce carbon microplasma on the surface of fused silica. The laser beam was focused onto the interface of graphite and fused silica to initiate microplasma.
2：Sample Selection and Data Sources:
Graphite plate and fused silica were used as samples. The graphite plate served as the target for carbon microplasma initiation.
3：List of Experimental Equipment and Materials:
Nanosecond pulsed fiber ytterbium laser (IPG-Photonics), graphite plate, fused silica, objective lens, platform with X and Y degrees of freedom, high-speed response photodiode (Thorlabs DET10A/M), optical fiber, photomultiplier tube, and oscilloscope (Tektronix TDS 3052C).
4：Experimental Procedures and Operational Workflow:
The laser beam was focused onto the graphite-fused silica interface. The intensity of the laser-induced microplasma was measured using a photodiode and photomultiplier tube connected to an oscilloscope.
5：Data Analysis Methods:
The obtained samples were analyzed using an optical profilometer Zygo ZeScope for detailed examination of the micro-relief.
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