Abstract

Formation of a novel hybrid-vector spatial plasmon–soliton in a Kerr slab embedded between metal plates is predicted and analyzed with a modified nonlinear Schrodinger equation encompassing hybrid-vector field characteristics. Assisted by the transverse plasmonic effect, the self-trapping dimension of the plasmon–soliton was substantially compressed (compared with the dielectrically cladded slab case) when reducing the slab width. The practical limitation of the plasmon–soliton size reduction is determined by available nonlinear materials and metal loss. For the extreme reported values of nonlinear index change, we predict a soliton with a cross section of 300nm×30nm (average dimension of 100nm).

© 2007 Optical Society of America

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