We examine manipulating the electromagnetic (EM) wave with an external static magnetic field (ESMF) taking advantage of the versatility of the magnetic photonic crystal (PC). The effect of a nonuniform ESMF on the permeability of the constituent magnetic material in the PC is demonstrated to create a gradient of the effective optical index in the crystal, leading to the focusing of the EM wave, with a magnetically tunable focal length, focused waist radius, and the intensity at the focus.
© 2008 Optical Society of America
Original Manuscript: May 8, 2008
Manuscript Accepted: August 31, 2008
Published: October 23, 2008
Shaowen Chen, Junjie Du, Shiyang Liu, Zhifang Lin, and S. T. Chui, "Focusing the electromagnetic wave with a magnetic field," Opt. Lett. 33, 2476-2478 (2008)