We demonstrate strong coupling between the Fabry–Pérot cavity plasmons and magnetic nanowire plasmons. The strong coupling leads to drastic enhancement of magnetic field intensity beneath a silver nanowire inside a metallic cavity. A Rabi splitting of 280 meV and a magnetic field intensity enhancement of 845 times the incident is achieved using the proposed geometry. The theoretical prediction agrees well with rigorous full wave simulations. The effect provides efficient tools for applications such as magnetic nonlinearity and magnetic sensors.
© 2013 Optical Society of America
Original Manuscript: January 16, 2013
Revised Manuscript: March 9, 2013
Manuscript Accepted: April 6, 2013
Published: May 3, 2013
Zheng Xi, Yonghua Lu, Wenhai Yu, Peijun Yao, Pei Wang, and Hai Ming, "Strong coupling between plasmonic Fabry–Pérot cavity mode and magnetic plasmon," Opt. Lett. 38, 1591-1593 (2013)