Fabrication of Periodic Curved Ripple Structures on Tungsten Surface Using Femtosecond Non-Cylindrical Vector Beam

Tingyuan, 王婷媛 Wang; Weiwei, 刘伟伟 Liu; Nan, 张楠 Zhang; Zhiqiang, 余志强 Yu; Lu, 付璐 Fu; Hongshuang, 刘洪双 Liu; Langfeng, 周朗峰 Zhou

doi:10.3788/cjl201946.0508023

Cited by 2 publications

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Section: Methodsmentioning

confidence: 94%

“…The polarization variation speed along the vertical direction increased with the increase in the rotation angle of RG2. A further explanation of the formation of the vector beam by the setup in Figure 1 can be found in [29,30]. When we removed the setup shown in the dashed frame in Figure 1, the apparatus in Figure 1 was able to be used to fabricate LIPSSs patterns on the tungsten surface.…”

Section: Methodsmentioning

confidence: 98%

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Compound Structures of Periodic Holes and Curved Ripples Fabricated by the Interference between the Converging Surface Plasmon Polaritons and Femtosecond Laser

2022

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Non-cylindrical vectorial femtosecond lasers are employed to irradiate tungsten surfaces. Compound nanopatterns composed of periodic nanoholes and semi-circular curved ripples are produced by scanning the target relative to the laser beam. The tangential direction of the curved ripples is perpendicular to the local polarization direction of the vectorial femtosecond laser beam. Therefore, the formation mechanism of the curved ripples can be attributed to the interference between the incident femtosecond laser and the laser-induced surface plasmon polaritons (SPPs). We found that, in addition to the curved ripples, periodic nanoholes with an average diameter of 406 nm also appeared on the target surface, and they all tended to appear at the vertexes of the semi-circular curved ripples, i.e., the converging point of SPPs. Further experiments demonstrated that the location of the periodic nanoholes was totally determined by the polarization state of the incident femtosecond laser. Therefore, we deduced that the convergent SPPs induced by the non-cylindrical vectorial femtosecond laser interfered with the incident laser at the convergent point, leading to the generation of periodic nanoholes. The investigations in this work exhibited the important role of manipulating the propagation of SPPs in femtosecond laser surface structuring, which not only diversifies the surface patterns that can be produced by laser-induced periodic surface structuring (LIPSS) but also provides deep insights in the excitation and propagation dynamics of SPPs.

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Section: Methodsmentioning

confidence: 94%

Section: Methodsmentioning

confidence: 98%

Compound Structures of Periodic Holes and Curved Ripples Fabricated by the Interference between the Converging Surface Plasmon Polaritons and Femtosecond Laser

2022

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Formation of nanostructures and optical analogues of massless Dirac particles via femtosecond lasers

Zhang¹,

Chen²

2020

Opt. Express

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Subwavelength-scale surface structures have many important engineering and nanotechnology applications, e.g., superhydrophobicity and light-trapping. However, an effective and economic nanofabrication solution for general engineering materials, e.g., metals or silicon, is still not available to date. In this paper, we present an experimental and theoretical study of the nanostructure formation mechanism based on double time-delayed femtosecond laser beams and the coupled mode theory (CMT), demonstrating the use of an optical analogue of massless Dirac particles for high-throughput nanofabrication for the first time. In the experiments, a variety of complex periodic structures, including hexagonally arranged nanoholes, nano-square array, and periodic ripples, have been fabricated. The formation mechanisms of these nanostructures are explained by the CMT, where a transient plasmonic waveguide array (TPWA) is formed by the interference between the preceding laser and the induced surface plasmon polaritons (SPPs). The SPPs induced by the subsequent laser propagates through the TPWA, resulting in conical diffraction. This result shows the first practical application of the massless Dirac dynamics in nanofabrication.

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Fabrication of Periodic Curved Ripple Structures on Tungsten Surface Using Femtosecond Non-Cylindrical Vector Beam

Cited by 2 publications

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Compound Structures of Periodic Holes and Curved Ripples Fabricated by the Interference between the Converging Surface Plasmon Polaritons and Femtosecond Laser

Compound Structures of Periodic Holes and Curved Ripples Fabricated by the Interference between the Converging Surface Plasmon Polaritons and Femtosecond Laser

Formation of nanostructures and optical analogues of massless Dirac particles via femtosecond lasers

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