We present theoretical and numerical results for a new method of obtaining hotspots that relies on nonreciprocal “one-way” propagation as opposed to the well-known case of resonance-based hotspots. The nonreciprocal propagation is achieved by the breaking of time-reversal symmetry through the use of magnetically biased medium. The location and existence of the hotspots depends on the magnetic bias that results in the breaking of the time-reversal symmetry. This results in the intriguing possibility of switching and spatial control of the hotspots through the magnetic bias.
© 2014 Optical Society of America
Optics at Surfaces
Original Manuscript: December 18, 2013
Manuscript Accepted: February 3, 2014
Published: March 19, 2014
Uday K. Chettiar, Arthur R. Davoyan, and Nader Engheta, "Hotspots from nonreciprocal surface waves," Opt. Lett. 39, 1760-1763 (2014)