Anisotropic elliptical microbumps on gold films induced by slit-shaped femtosecond laser

Shuai Gao

doi:10.1117/12.2602313

24 June 2021 Anisotropic elliptical microbumps on gold films induced by slit-shaped femtosecond laser

Shuai Gao

Author Affiliations +

Proceedings Volume 11885, International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021); 1188513 (2021) https://doi.org/10.1117/12.2602313
Event: 2021 International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021), 2021, Xi'an, China

Abstract

Asymmetric metal micro/nano-structures can generate multiple modes of plasmon resonance, and have been widely used in the fields of structural color anti-counterfeiting, multiple information coding, etc. In this paper, the slit-shaped femtosecond laser was proposed to fabricate anisotropic elliptical microbumps in a non-ablation state on gold films. The influence of pulse energy and slit width on the size and the ratio of long and short axis of elliptical microbumps were studied. And the reflectance spectra of the elliptical microbump arrays under different polarizations were measured, which verified the polarization-dependent spectral characteristics of the elliptical microbump structures.

Citation Download Citation

Shuai Gao "Anisotropic elliptical microbumps on gold films induced by slit-shaped femtosecond laser", Proc. SPIE 11885, International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2021), 1188513 (24 June 2021); https://doi.org/10.1117/12.2602313

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