Optical properties of volcano-shaped gold-silicon structures fabricated by femtosecond laser exposure

E. Yu. Ponkratova^a, E. I. Ageev^a, M. V. Zhukov^b, A. O. Larin^a, I. S. Mukhin^cd, D. A. Zuev<sup>a

a</sup> ITMO University, St. Petersburg, Russia
^b Institute for Analytical Instrumentation, Russian Academy of Sciences, St. Petersburg, Russia
^c Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg, Russia
^d Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia

Abstract: Here, we experimentally study the photoluminescence of volcano-shaped hybrid structures created from a bi-layer gold-silicon film exposed by several femtosecond laser pulses at a wavelength of 1048 nm. The external and phase composition of the obtained structures were analyzed by a combination of atomic force microscopy and Raman studies. The damage threshold is found and the stability of the broadband photoluminescence of such structures is demonstrated.

Keywords: gold-silicon nanostructures, femtosecond laser irradiation, broadband photoluminescence.

Received: 27.03.2023
Revised: 02.03.2024
Accepted: 02.03.2024

DOI: 10.21883/PJTF.2023.13.55728.19568

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