Chiral thin film structures based on arrays of cobalt nanospirals obtaned by oblique deposition

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Resumo

The results of experimental studies of chiral thin film structures based on arrays of cobalt nanospirals obtained by oblique angle deposition are presented. It has been shown that in the conditions of electron-beam evaporation on rotating tilted substrate arrays of nanospirals winded in the same direction are formed. By varying substrate rotation speed it is possible to change geometrical sizes of those helixes (helix pitch, helix radius). As obtained metasurface showed distinct asymmetry of optical characteristics at the reflection of right and left circular polarized light.

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Sobre autores

O. Trushin

Valiev Institute of Physics and Technology of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: ostrushin@mail.ru

Yaroslavl Branch

Rússia, Yaroslavl

I. Fattakhov

Valiev Institute of Physics and Technology of the Russian Academy of Sciences

Email: ostrushin@mail.ru

Yaroslavl Branch

Rússia, Yaroslavl

A. Popov

Valiev Institute of Physics and Technology of the Russian Academy of Sciences

Email: ostrushin@mail.ru

Yaroslavl Branch

Rússia, Yaroslavl

L. Mazaletsky

Valiev Institute of Physics and Technology of the Russian Academy of Sciences; Demidov Yaroslavl State University

Email: ostrushin@mail.ru

Yaroslavl Branch

Rússia, Yaroslavl; Yaroslavl

R. Gaidukasov

Valiev Institute of Physics and Technology of the Russian Academy of Sciences

Email: ostrushin@mail.ru
Rússia, Moscow

A. Miakonkikh

Valiev Institute of Physics and Technology of the Russian Academy of Sciences

Email: ostrushin@mail.ru
Rússia, Moscow

Bibliografia

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2. Fig. 1. Microscopic images of nanostructured Co/Si films obtained at different substrate rotation speeds: 0.3 rpm – cross section (a) and top view (b), 0.6 rpm – cross section (c), 1.6 rpm – cross section (d).

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3. Fig. 2. Dependences of the degree of polarization of the reflected wave on the wavelength of the used radiation for two types of incident circularly polarized waves (right-handed-R and left-handed-L) for samples with different rotation speeds: 0.2 (a), 0.3 (b), 0.6 (c) and 1.6 rpm (d).

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