A plasmonic structure with double gold patches is proposed for enhancing the spontaneous emission of a magnetic dipole transition through a magnetic hot area. A Purcell factor of nearly 2000 can be obtained at optical frequencies together with a low sensitivity in spatial and spectral mismatches between the light emitter and the resonance mode. The associated resonance can be tuned from the visible to the IR frequencies, enabling efficient control of forbidden transitions using plasmonic structures.
© 2011 Optical Society of America
Original Manuscript: March 22, 2011
Revised Manuscript: May 16, 2011
Manuscript Accepted: May 18, 2011
Published: June 15, 2011
Tianhua Feng, Ying Zhou, Dahe Liu, and Jensen Li, "Controlling magnetic dipole transition with magnetic plasmonic structures," Opt. Lett. 36, 2369-2371 (2011)