Optical spin currents in chiral optical fibers
https://doi.org/10.17586/2226-1494-2025-25-5-807-816
Abstract
This paper is devoted to the study of optical chiral cylindrical waveguides from the point of view of their application in optical spintronics. In the paper, it is proposed to use a chiral optical cylindrical waveguide as an optical spin diode. The mode structure of the waveguide under consideration is calculated and the dispersion equation for fundamental modes of the waveguide with an azimuthal number m = ±1 is numerically solved for various values of the chirality parameter of the waveguide material. Expressions for the energy flux and the optical spin current inside the waveguide are derived. It is shown that in the single-mode regime, the direction of the optical spin currents in the waveguide is determined exclusively by the sign of the chirality parameter of the waveguide material, regardless of the azimuthal number and the direction of mode propagation. Due to this, the superposition of m = 1 and m = –1 modes propagating in opposite directions will have a zero energy flux, but a nonzero optical spin current. Our results expand the element base of optical spintronics and open up new ways for creating energy-efficient optical computing systems.
Keywords
optical spin,
optical spintronics,
chirality,
optical information transfer,
optical waveguides,
optical nanofibers
Supporting agencies: The studies were supported by the Russian Science Foundation (Project 23-72-10059). Ilya Deriy acknowledges the BASIS Foundation for valuable support
About the Authors
I. A. Deriy
Harbin Engineering University; ITMO University
China
China
Ilya A. Deriy — Junior Researcher; Junior Reseacher
sc 57221052856
Qingdao, 266000
Saint Petersburg, 197101
D. F. Kornovan
ITMO University
Russian Federation
Russian Federation
Danil F. Kornovan — PhD (Physics & Mathematics), Engineer
sc 56644703300
Saint Petersburg, 197101
M. I. Petrov
ITMO University
Russian Federation
Russian Federation
Mihail I. Petrov — PhD (Physics & Mathematics), Associate Professor, Senior Researcher
Researcher ID K-5924-2012
Saint Petersburg, 197101
A. A. Bogdanov
Harbin Engineering University; ITMO University
China
China
Andrey A. Bogdanov — PhD (Physics & Mathematics), Senior Researcher, Harbin Engineering University, Qingdao, 266000, China; Senior Researcher, Associate Professor of Practice
sc 56393877900
Qingdao, 266000
Saint Petersburg, 197101
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Review
For citations:
Deriy I.A., Kornovan D.F., Petrov M.I., Bogdanov A.A. Optical spin currents in chiral optical fibers. Scientific and Technical Journal of Information Technologies, Mechanics and Optics. 2025;25(5):807-816. https://doi.org/10.17586/2226-1494-2025-25-5-807-816
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