Deep Subwavelength Terahertz Waveguides Using Gap Magnetic Plasmon Atsushi Ishikawa,1 Shuang Zhang,1 Dentcho A. Genov,1 Guy Bartal,1 and Xiang Zhang1,2,* 1
NSF Nanoscale Science and Engineering Center (NSEC), 5130 Etcheverry Hall, University of California, Berkeley, California 94720-1740, USA 2 Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA (Received 6 September 2008; published 28 January 2009) We propose a novel subwavelength terahertz (THz) waveguide based on the magnetic plasmon polariton mode guided by a narrow gap in a negative permeability metamaterial. Deep subwavelength waveguiding (