Efficient Co/Pt THz spintronic emitter with tunable polarization

被引：8
|
作者：
Buryakov, A. M. [1 ]
Gorbatova, A. V. [1 ]
Avdeev, P. Y. [1 ]
Lebedeva, E. D. [1 ]
Brekhov, K. A. [1 ]
Ovchinnikov, A. V. [2 ]
Gusev, N. S. [3 ,4 ]
Karashtin, E. A. [3 ,4 ]
Sapozhnikov, M. V. [3 ,4 ]
Mishina, E. D. [1 ]
Tiercelin, N. [5 ]
Preobrazhensky, V. L. [6 ]
机构：
[1] MIREA Russian Technol Univ, Moscow 119454, Russia
[2] Russian Acad Sci, Joint Inst High Temp, Izhorskaya 13 Bldg 2, Moscow 125412, Russia
[3] RAS, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia
[4] Lobachevsky State Univ, Nizhnii Novgorod 603950, Russia
[5] Univ Lille, Univ Polytech Hauts de France, CNRS, UMR 8520,IEMN,Cent Lille, F-59000 Lille, France
[6] RAS, Prokhorov Gen Phys Inst, Moscow 119991, Russia
来源：
APPLIED PHYSICS LETTERS | 2023年 / 123卷 / 08期
关键词：
GENERATION; PULSES;
D O I：
10.1063/5.0160497
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the design of a spintronic emitter based on the Pt(3nm)/Co(3nm) 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 250Oe at room temperature, we have achieved the full range of terahertz polarization rotation from 0 degrees to 360 degrees. 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 similar to 160 nJ/cm(2) at an excitation flux of 4 mJ/cm(2).
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页数：6
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