Abstract
In this paper, without circular scanning of laser focus, annular ablation region was reported to be induced by femtosecond laser static irradiation of ZnO surface immersed in oil, and these annular ablation regions were all covered by laser-induced periodic surface structures (LIPSS) upon irradiation of either linearly-polarized light or circularly-polarized light. This novel phenomenon was found to be related to the bubbles in-situ generated and attached at laser focus inside oil during irradiation process. With increasing irradiation pulse number, the shallow annular ablation region transited to a deep annular groove, and the unablated region surrounded by the annular ablation region was finally ablated to a LIPSS-covered spherical-crown-shaped bump. Finite-difference-time-domain (FDTD) simulation shows that the bubble at the laser focus may act as a beam shaping device to partly transform a Gaussian-intensity-profile beam to an annular-intensity-profile beam and the increased bubble size induces a decrease of the radius of the annular beam, which can roughly explain the experimentally observed morphology transformation phenomenon. Further analysis of light field transformation based on matrix optics further demonstrates that the annular intensity profile is originated from hollow beams generated after incident light passing through the bubble-type radial polarizer.
Similar content being viewed by others
Data availability
All data generated or analyzed during this study are included in this published article.
Code availability
Custom code for FDTD simulation is available from the corresponding author upon reasonable request.
References
J. Reif, F. Costache, M. Henyk, S.V. Pandelov, Ripples revisited: non-classical morphology at the bottom of femtosecond laser ablation craters in transparent dielectrics. Appl. Surf. Sci. 197–198, 891–895 (2002)
V.R. Bhardwaj, E. Simova, P.P. Rajeev, C. Hnatovsky, R.S. Taylor, D.M. Rayner, P.B. Corkum, Optically produced arrays of planar nanostructures inside fused silica. Phys. Rev. Lett. 96, 057404 (2006)
D. Dufft, A. Rosenfeld, S.K. Das, R. Grunwald, J. Bonse, Femtosecond laser-induced periodic surface structures revisited: a comparative study on ZnO. J. Appl. Phys. 105, 034908 (2009)
J. Yong, S.C. Singh, Z. Zhan, J. Huo, F. Chen, C. Guo, Reducing adhesion for dispensing tiny water/oil droplets and gas bubbles by femtosecond laser-treated needle nozzles: superhydrophobicity, superoleophobicity, and superaerophobicity. Chem. Nano. Mat. 5, 241–249 (2019)
C. Li, L. Yang, X. Ren, Y. Yang, G. Cheng, Femtosecond laser-induced non-centrosymmetric surface microstructures on bulk metallic glass for unidirectional droplet micro-displacement. J. Phys. D 53, 105305 (2020)
H. Wang, J. Song, Q. Li, X. Zeng, Y. Dai, Formation of nanograting in fused silica by temporally delayed femtosecond double-pulse irradiation. J. Phys. D Appl. Phys. 51, 105305 (2018)
R. Sahin, T. Ersoy, S. Akturk, Ablation of metal thin films using femtosecond laser Bessel vortex beams. Appl. Phys. A 118, 125–129 (2015)
C. Hnatovsky, V.G. Shvedov, N. Shostka, A.V. Rode, W. Krolikowski, Polarization-dependent ablation of silicon using tightly focused femtosecond laser vortex pulses. Opt. Lett. 37, 226–228 (2012)
K.K. Anoop, A. Rubano, R. Fittipaldi, X. Wang, D. Paparo, A. Vecchione, L. Marrucci, R. Bruzzese, S. Amorusol, Polarization-dependent ablation of silicon using tightly focused femtosecond laser vortex pulses. Opt. Lett. 37, 226–228 (2012)
C. Hnatovsky, V.G. Shvedov, W. Krolikowski, A.V. Rode, Materials processing with a tightly focused femtosecond laser vortex pulse. Opt. Lett. 35, 3417–3419 (2010)
M.W. Beijersbergen, L. Allen, H. van der Veen, J.P. Woerdman, Astigmatic laser mode converters and transfer of orbital angular momentum. Opt. Commun. 96, 123–132 (1993)
N.R. Heckenberg, R. McDuff, C.P. Smith, A.G. White, Generation of optical phase singularities by computer-generated holograms. Opt. Lett. 17, 221–223 (1992)
J.J. Nivas, S. He, A. Rubano, A. Vecchione, D. Paparo, L. Marrucci, R. Bruzzese, S. Amoruso, Direct femtosecond laser surface structuring with optical vortex beams generated by a q-plate. Sci. Rep. 5, 17929–17929 (2015)
M. Beresna, M. Gecevičius, N.M. Bulgakova, P.G. Kazansky, Twisting light with micro-spheres produced by ultrashort light pulses. Opt. Express. 9, 18989–18996 (2015)
Acknowledgements
Thanks for the financial support from the National Natural Science Foundation of China (Grant Nos. 11974147, 11774220, 61205128).
Funding
National Natural Science Foundation of China (Grant Nos. 11974147, 11774220, 61205128).
Author information
Authors and Affiliations
Corresponding authors
Ethics declarations
Conflict of interest
The authors have declared that no conflict of interest exists.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Song, J., Kong, D., Zhang, X. et al. LIPSS-covered annular ablation region induced on ZnO surface by focusing femtosecond laser beam spatially shaped by bubbles in cedar oil. Appl. Phys. A 127, 18 (2021). https://doi.org/10.1007/s00339-020-04149-2
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s00339-020-04149-2