当前位置: X-MOL 学术J. Phys. Soc. Jpn. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Effect of Microwave Cavity-Mode Properties on Cavity-Magnon Coupling Strength
Journal of the Physical Society of Japan ( IF 1.7 ) Pub Date : 2021-03-03 , DOI: 10.7566/jpsj.90.044701
Takayuki Suzuki 1
Affiliation  

Recently, the cavity-magnon-polariton (CMP) system as a quasiparticle has been attracting attention because of its potential application in quantum information devices and axion detectors and as a new frontier in quantum physics. The achievement of strong interaction and its control have been extensively researched. The conventional strategy for achieving this mainly involves increasing the magnon volume and maximizing the cavity filling factor. To acquire a guideline for more effective CMP design, this study focuses on the cavity modes, which is a new perspective. Frequency spectral measurements and numerical simulations of CMP systems were performed based on the Kittel mode in yttrium iron garnet (YIG) spheres and various cavity modes. The experimentally obtained coupling strengths from the frequency spectra and numerical simulation study using models similar to the applied cavities reveal a quantitative relation between the coupling strength and the effective magnetic filling factor, which can evaluate the H1 occupancy independent of the cavity modes. Moreover, they indicate that the coupling strength and cooperativity per unit cavity volume can be categorized into two groups depending on the symmetry of the cavity modes. Cavities with Cv symmetrical resonant modes can most effectively interact with YIG spheres, obtaining stronger coupling strength per unit cavity volume, compared to those with other symmetrical modes. It is experimentally demonstrated that a very strong coupling constant and high cooperativity can be easily obtained at 297 K using a transverse electric01δ-mode cavity with a high dielectric constant and Cv symmetrical mode, even though a small-volume YIG sphere with a diameter of 1 mm is employed. The obtained mode charts reveal the relationship between the cavity modes, magnetic filling factor, and coupling strength and are expected to be beneficial for more effective design of strongly coupled CMP systems.

中文翻译:

微波腔模特性对腔-磁振子耦合强度的影响

近年来,作为准粒子的腔磁非极化(CMP)系统由于其在量子信息设备和轴测仪中的潜在应用以及作为量子物理学的新领域而受到关注。人们已经对强相互作用的实现及其控制进行了广泛的研究。实现此目的的常规策略主要包括增加磁振子的体积并最大化空腔填充因子。为了获得更有效的CMP设计指南,本研究着重于腔模,这是一个新的观点。CMP系统的频谱测量和数值模拟是基于钇铁石榴石(YIG)球体中的Kittel模式和各种腔模式进行的。H 1的占用与腔模式无关。而且,它们表明,根据腔模的对称性,每单位腔体积的耦合强度和合作性可分为两类。有空腔Ç v对称的谐振模式可以最有效地与YIG球,获得的每单位腔容积更强的耦合强度,比起那些与其它对称模式相互作用。据实验证明,非常强的耦合常数和高的协同可以很容易地在297K下使用横向电场获得01 δ -mode腔具有高介电常数和Ç v即使使用直径为1 mm的小体积YIG球,也可以使用对称模式。所获得的模态图揭示了腔模,磁填充系数和耦合强度之间的关系,并有望有助于更有效地设计强耦合CMP系统。
更新日期:2021-03-03
down
wechat
bug