Percolation Transition and Optical Properties of Thin Films of Gold

Issues » Volume 39, Issue 6

R. I. Bihun$^{1}$, Z. V. Stasyuk$^{1}$, O. V. Stroganov$^{1}$, D. S. Leonov$^{2}$

$^{1}$Ivan Franko National University of Lviv, 1 Universytetska Str., UA-79000 Lviv, Ukraine
$^{2}$Technical Centre, NAS of Ukraine, 13 Pokrovs’ka Str., 04070 Kyiv, Ukraine

Received: 31.05.2017. Download: PDF

Optical absorption in the visible and near-infrared wavelength ranges (300–2500 nm) and its connection with percolation transition in gold thin films of different thicknesses (2–20 nm) are experimentally investigated as well as the influence of germanium sublayers with thickness of 0.5 nm on these effects. As shown, the percolation in thin films depends on growth mechanisms and modes of films’ formation on the amorphous glass substrate. The predeposition of germanium sublayers on the glass substrate reduces the threshold thickness of percolation and increases absorption capacity of investigated films in comparison with similar ones deposited on the clean glass surface. Such a behaviour of films deposited on germanium sublayers is caused by the decrease of crystallites’ average linear sizes and, therefore, by the increase of scattering-centres’ concentration on the substrate surface in contrast to films deposited on the clean glass substrate.

Key words: metal thin film, semiconductor sublayers of subatomic thickness, optical absorption, percolation.

URL: http://mfint.imp.kiev.ua/en/abstract/v39/i06/0743.html

DOI: https://doi.org/10.15407/mfint.39.06.0743

PACS: 64.60.ah, 73.25.+i, 73.50.Mx, 73.61.At, 78.20.Ci, 78.66.Bz, 81.15.Kk

Citation: R. I. Bihun, Z. V. Stasyuk, O. V. Stroganov, and D. S. Leonov, Percolation Transition and Optical Properties of Thin Films of Gold, Metallofiz. Noveishie Tekhnol., 39, No. 6: 743—752 (2017) (in Ukrainian)

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