Irradiation of gold films with an acutely focused femtosecond laser beam with different intensity distributions

Gulinyan V.A., Ageev E.I., Gremilov M.A., Zuev D.A.

For Russian citation (Opticheskii Zhurnal):

Гулинян В.А., Агеев Э.И., Гремилов М.А., Зуев Д.А. Облучение золотых плёнок остросфокусированным пучком фемтосекундного лазера с различными распределениями плотности энергии // Оптический журнал. 2025. Т. 92. № 12. С. 77–83. http://doi.org/10.17586/1023-5086-2025-92-12-77-83

Gulinyan V.A., Ageev E.I., Gremilov M.A., Zuev D.A. Irradiation of gold films with an acutely focused femtosecond laser beam with different intensity distributions [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 12. P. 77–83. http://doi.org/10.17586/1023-5086-2025-92-12-77-83

For citation (Journal of Optical Technology):

Abstract:

Subject of study. Gold needle-like nanostructures created by single laser pulses with Gaussian and toroidal intensity distributions. Aim of study. Creation of needle structures and comparison of the energy efficiency of creating these structures at different intensity distribution profiles in the beam. Method. Direct laser writing of nanostructures by single laser pulses with a Gaussian intensity profile and a toroidal one obtained using a vortex plate. Main results. Gold nanostructures were created using
two types of intensity distribution profiles and scattering spectra for these structures were obtained. Practical significance. The arrays of needle-like nanostructures obtained will be used as a structural element to create a biosensor based on optically resonant structures made of gold.

Keywords:

gold films, nanojets, nanobumps, laser-induced generation, vortex plate

Acknowledgements:

the reported study was supported by the Russian Science Foundation (Project No. 24-72-10075, https://rscf.ru/project/24-72-10075/)

OCIS codes: 220.4241, 290.5820, 310.6845

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