Abstract

We propose a novel type of photonic-crystal (PC)-based nanostructures for efficient and tunable optically-induced spin current generation via the spin Seebeck and inverse spin Hall effects. It has been experimentally demonstrated that optical surface modes localized at the PC surface covered by ferromagnetic layer and materials with giant spin-orbit coupling (SOC) notably increase the efficiency of the optically-induced spin current generation, and provides its tunability by modifying the light wavelength or angle of incidence. Up to 100% of the incident light power can be transferred to heat within the SOC layer and, therefore, to the spin current. Importantly, the high efficiency becomes accessible even for ultra-thin SOC layers. Moreover, the surface patterning of the PC-based spintronic nanostructure allows for the local generation of spin currents at the pattern scales rather than the diameter of the laser beam.

RAS ID

36255

Document Type

Journal Article

Date of Publication

2-19-2021

Volume

13

Issue

11

School

Electron Science Research Institute

Publisher

Royal Society of Chemistry

Comments

This is an author's accepted manuscript of: Shilina, P. V., Ignatyeva, D. O., Kapralov, P. O., Sekatskii, S. K., Nur-E-Alam, M., Vasiliev, M., ... Belotelov, V. I. (2021). Nanophotonic structures with optical surface modes for tunable spin current generation. Nanoscale, 13(11), 5791-5799.

https://doi.org/10.1039/d0nr08692d

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Link to publisher version (DOI)

10.1039/d0nr08692d