Hybrid Co/2D-WSe2-based THz spintronic emitter with tunable polarization

A. M. Buryakov; A. V. Gorbatova; P. Y. Avdeev; E. D. Lebedeva; N. S. Gusev; E. A. Karashtin; I. Yu. Pashen'kin; M. V. Sapozhnikov; E. D. Mishina

doi:10.1063/5.0274793

Hybrid Co/2D-WSe2-based THz spintronic emitter with tunable polarization

A A. M. Buryakov (MIREA-Russian Technological University 1 , Moscow 119454,) A A. V. Gorbatova (MIREA-Russian Technological University 1 , Moscow 119454,) P P. Y. Avdeev (MIREA-Russian Technological University 1 , Moscow 119454,) E E. D. Lebedeva (MIREA-Russian Technological University 1 , Moscow 119454,) N N. S. Gusev (Institute for Physics of Microstructures RAS 2 , Nizhny Novgorod 603950,) E E. A. Karashtin (MIREA-Russian Technological University 1 , Moscow 119454,) I I. Yu. Pashen'kin (Institute for Physics of Microstructures RAS 2 , Nizhny Novgorod 603950,) M M. V. Sapozhnikov (MIREA-Russian Technological University 1 , Moscow 119454,) E E. D. Mishina (MIREA-Russian Technological University 1 , Moscow 119454,)

Abstract

We demonstrate an efficient THz spintronic emitter using a Co/WSe2 heterostructure that enables direct control of the emitted THz polarization. The device is excited by femtosecond laser pulses and leverages spin-to-charge conversion at the Co/WSe2 interface to generate broadband THz pulses. We observe that the THz emission polarization can be continuously tuned via the magnetization orientation without significant loss in intensity. At higher pump fields, nonlinear optical effects in the WSe2 layer contribute to the THz output, indicating an emission enhancement beyond the conventional spintronic mechanism.

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Article Details

Journal Applied Physics Letters

Volume / Issue Vol. 127, Issue 5

Published August 04, 2025

DOI 10.1063/5.0274793

ISSN 0003-6951

Publisher American Institute of Physics

Journal Info

Applied Physics Letters

American Institute of Physics

ISSN: 0003-6951 Physical Sciences