Observation of magnon-magnon coupling with high cooperativity in Ni80Fe20 cross-shaped nanoring array

被引：11
|
作者：
Adhikari, Kartik [1 ,2 ]
Choudhury, Samiran [1 ]
Barman, Saswati [3 ]
Otani, Yoshichika [4 ,5 ]
Barman, Anjan [1 ]
机构：
[1] SN Bose Natl Ctr Basic Sci, Dept Condensed Matter Phys & Mat Sci, Block JD,Sect 3, Kolkata 700106, India
[2] New Alipore Coll, Dept Phys, Kolkata 700053, India
[3] Inst Engn & Management, Sect V, Kolkata 700091, India
[4] CEMS RIKEN, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
[5] Univ Tokyo, Inst Solid State Phys, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778581, Japan
来源：
NANOTECHNOLOGY | 2021年 / 32卷 / 39期
关键词：
ferromagnetic nanostructures; magnon-magnon coupling; spin wave; time-resolved magneto-optical Kerr effect microscope; micromagnetic simulation; INFORMATION; DYNAMICS;
D O I：
10.1088/1361-6528/ac0ddc
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We report here an experimental observation of dynamic dipolar coupling induced magnon-magnon coupling and spin wave (SW) mode splitting in Ni80Fe20 cross-shaped nanoring array. Remarkably, we observe an anticrossing feature with minimum frequency gap of 0.96 GHz and the corresponding high cooperativity value of 2.25. Interestingly, splitting of the highest frequency SW mode occurs due to the anisotropic dipolar interactions between the cross nanorings. Furthermore, using micromagnetic simulations we demonstrate that the coupled SW modes propagate longer as opposed to other modes present in this system. Our work paves the way towards integrated hybrid systems-based quantum magnonics and on-chip coherent information transfer.
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页数：8
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