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Nanophotonic structures with optical surface modes for tunable spin current generation
Ist Teil von
Nanoscale, 2021-03, Vol.13 (11), p.5791-5799
Ort / Verlag
England: Royal Society of Chemistry
Erscheinungsjahr
2021
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
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.
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.