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Resonance light absorption of granular aluminium and silver films placed on a rough sublayer of multilayered ZnS 

1Wan Jian, 2Beloshenko K. S., 2Makarovskiy M.,  2Riabenko I., 2Shulga S. and 3,4Prokhorenko S.

1College of Information and Communication Engineering, Harbin Engineering University, Harbin, China
2Faculty of Radio Physics, Biomedical Electronics and Computer Systems, V. N. Karazin Kharkiv National University, Kharkiv, Ukraine
3Center for Microelectronics and Nanotechnology, University of Rzeszow, Poland
4Department of Measuring Information Technologies, Lviv Polytechnic National University, Ukraine

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Abstract. We report the spectrophotometric studies of two-layer granular films of aluminium and silver disjoint by ZnS layers. This multilayered system is prepared with two-stage deposition of Al and Ag separated by a thin ZnS film. Dipole–dipole interactions between the optical thin films in the multilayer sandwich are studied and optical absorption bands are identified at different stages of deposition procedure. The plasma frequency of aluminium is determined from the position of maximum of the high-frequency band, which is peculiar to the two-layer sample based on the granular aluminium film enclosed between the ZnS layers.

Keywords: Al–Ag nanoparticles, dipole–dipole interactions, nanostructures, absorption bands, optical films, coupled oscillators

PACS: 42.25.Fx, 42.70.Ce, 61.46.-w, 71.55.Ak
UDC: 535.421
Ukr. J. Phys. Opt. 20 10-15

doi: 10.3116/16091833/20/1/10/2019

Received: 14.12.2018

Анотація.Описано спектрофотометричні дослідження двошарових гранульованих плівок алюмінію і срібла, розділених шарами ZnS. Таку багатошарову систему приготовлено шляхом двостадійного висадження Al і Ag, розділених тонкою плівкою ZnS. Досліджено диполь–дипольні взаємодії між оптичними тонкими плівками в багатошаровому сендвічі та визначено оптичні смуги поглинання на різних етапах процедури осадження. Виходячи з позиції максимуму високочастотної смуги для двошарового зразка на основі гранульованої алюмінієвої плівки, укладеної поміж шарами ZnS, встановлено плазменну частоту алюмінію.

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