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Updated: Aug 23, 2025
Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
Published on: September 25, 2020
A spin modulating device, tuned by the Fermi energy, in honeycomb-like substrates periodically stubbed with
Adel Belayadi1,2, Panagiotis Vasilopoulos3
1Department of Physics, Ecole Supérieure des Sciences des Aliments et Industrie Alimentaire, ESSAIA, El Harrach, Algeria.
Abstract:
We investigate spin transport through graphene-like substrates stubbed vertically with transition-metal-dichalcogenides (TMDs). A tight-binding model is used based on a graphene-like Hamiltonian that includes different types of spin-orbit coupling (SOC) terms permitted by theC3symmetry group in TMDs/graphene-like heterostructures. The results show a spin modulation obtained by tuning the strength and sign of the Fermi energyEand not by varying the SOC strength as is mainly the case of Datta and Das. The spin conductance is directly controlled by the value ofE. In addition, a perfect electron-spin modulation is obtained when a vertical strain is introduced. In this case, the spin conductance exhibits a strong energy dependence. The results may open the route to a combination of graphene-like substrates with TMD stubs and the development of spin-transistor devices controlled by the Fermi energy rather than the SOC strength.
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