• Editors' Suggestion

Abnormal anticrossing effect in photon-magnon coupling

Biswanath Bhoi, Bosung Kim, Seung-Hun Jang, Junhoe Kim, Jaehak Yang, Young-Jun Cho, and Sang-Koog Kim
Phys. Rev. B 99, 134426 – Published 17 April 2019
PDFHTMLExport Citation

Abstract

We report the experimental demonstration of an abnormal, opposite anticrossing effect in a photon-magnon-coupled system that consists of an yttrium iron garnet film and an inverted pattern of split-ring resonator structure (denoted as ISRR) in a planar geometry. It is found that the normal shape of anticrossing dispersion typically observed in photon-magnon coupling is changed to its opposite anticrossing shape just by changing the position/orientation of the ISRR's split gap with respect to the microstrip line axis along which ac microwave currents are applied. Characteristic features of the opposite anticrossing dispersion and its linewidth evolution are analyzed with the help of analytical derivations based on electromagnetic interactions. The observed opposite anticrossing dispersion is ascribed to the compensation of both intrinsic damping and coupling-induced damping in the magnon modes. This compensation is achievable by controlling the relative strength and phase of oscillating magnetic fields generated from the ISRR's split gap and the microstrip feeding line. The position/orientation of an ISRR's split gap provides a robust means of controlling the dispersion shape of anticrossing and its damping in a photon-magnon coupling, thereby offering more opportunity for advanced designs of microwave devices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 31 October 2018

DOI:https://doi.org/10.1103/PhysRevB.99.134426

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Biswanath Bhoi, Bosung Kim, Seung-Hun Jang, Junhoe Kim, Jaehak Yang, Young-Jun Cho, and Sang-Koog Kim*

  • National Creative Research Initiative Center for Spin Dynamics and Spin-Wave Devices, Nanospinics Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 151-744, Republic of Korea

  • *sangkoog@snu.ac.kr

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 13 — 1 April 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×