Germanium Wetting Layers’ Dimensional Effect in Structural and Optical Properties of Silver Films

Q4 Materials Science

Nanosistemi, Nanomateriali, Nanotehnologii Pub Date : 2022-12-01 DOI:10.15407/nnn.20.04.929

R. Bihun, M. Buchkovs’ka, B. P. Koman, D. Leonov

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Abstract

The peculiarities of light absorption in silver films of different thickness (2–20 nm) deposited on germanium underlayers of different mass thickness are experimentally investigated. The conditions of percolation transition in 5 nm thick silver films deposited on germanium underlayers in the range of 1 nm are studied. The influence of germanium underlayers with a mass thickness up to 1 nm with a step of 0.2 nm in the visible and near-infrared wavelength range (300–2500 nm) on the above-mentioned properties of silver films is investigated. Optical percolation in silver films is associated with the peculiarities of growth mechanisms and modes of formation of metal condensate on an amorphous glass substrate. As shown, the germanium underlayers previously applied to the glass substrate reduce the threshold thickness of the optical percolation transition in the silver film and increase their absorbency compared to similar films formed on a clean glass surface. The increase in the absorption capacity of films deposited on the surface of the germanium underlayer is due to a decrease in the average linear size of crystallites compared to similar samples formed on a clean glass surface, and thus, an increase in the number of scattering metal centres per unit surface area.

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锗润湿层的尺寸效应对银膜结构和光学性能的影响

实验研究了在不同质量厚度的锗衬底上沉积的不同厚度(2 ~ 20 nm)银膜的光吸收特性。研究了锗衬底厚度为1 nm，厚度为5 nm的银膜的渗透转变条件。在可见光和近红外波长范围(300-2500 nm)内，研究了质量厚度为1 nm、步进为0.2 nm的锗衬底层对银膜上述性能的影响。在非晶玻璃衬底上，银膜中的光学渗透与金属凝聚物的生长机制和形成模式的特殊性有关。如图所示，与在干净的玻璃表面上形成的类似薄膜相比，先前应用于玻璃基板的锗衬底降低了银薄膜中光学渗透过渡的阈值厚度，并增加了它们的吸收性。沉积在锗下层表面的薄膜吸收能力的增加是由于与在干净玻璃表面形成的类似样品相比，晶体的平均线性尺寸减小了，因此，单位表面积上散射金属中心的数量增加了。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanosistemi, Nanomateriali, Nanotehnologii Materials Science-Materials Science (miscellaneous)

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： Collected Scientific Transactions "Nanosistemi, Nanomateriali, Nanotehnologii" was founded in 2003, and it is one of the leading periodical scientific transactions of Ukraine. Editor-in-chief of the Collected Scientific Transactions ‘Nanosistemi, Nanomateriali, Nanotehnologii’ is Corresponding Member of the N.A.S. of Ukraine, Dr. Sci. (Phys.-Math.), Prof. Valentyn A. TATARENKO.