Efficient Co/Pt THz spintronic emitter with tunable polarization - Archive ouverte HAL
Journal Articles Applied Physics Letters Year : 2023

Efficient Co/Pt THz spintronic emitter with tunable polarization

A. Gorbatova
P. Avdeev
E. Lebedeva
K. Brekhov
A. Ovchinnikov
E. Mishina

Abstract

We report on the design of a spintronic emitter based on the Pt(3 nm)/Co(3 nm) structure, which enables the control over terahertz radiation polarization. Utilizing the field-induced magnetization rotation that takes place at low magnetic fields of up to 250 Oe at room temperature, we have achieved the full range of terahertz polarization rotation from 0° to 360°. This rotation became possible due to the uniaxial magnetic anisotropy induced in the plane of the cobalt film during its fabrication. We evaluated the efficiency of the Co/Pt structure in generating terahertz radiation and found that the terahertz pulse energy flux reaches ∼160 nJ/cm2 at an excitation flux of 4 mJ/cm2.
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hal-04243717 , version 1 (24-10-2023)

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A. Buryakov, A. Gorbatova, P. Avdeev, E. Lebedeva, K. Brekhov, et al.. Efficient Co/Pt THz spintronic emitter with tunable polarization. Applied Physics Letters, 2023, 123 (8), ⟨10.1063/5.0160497⟩. ⟨hal-04243717⟩
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