We show that an inhomogeneous defocusing nonlinearity that grows toward the periphery in the positive and negative transverse directions at different rates can support strongly asymmetric fundamental and multipole bright solitons, which are stable in wide parameter regions. In the limiting case, when nonlinearity is uniform in one direction, solitons transform into stable domain walls (fronts), with constant or oscillating intensity in the homogeneous region, attached to a tail rapidly decaying in the direction of growing nonlinearity.
© 2012 Optical Society of America
Original Manuscript: October 8, 2012
Revised Manuscript: November 4, 2012
Manuscript Accepted: November 4, 2012
Published: November 30, 2012
Yaroslav V. Kartashov, Valery E. Lobanov, Boris A. Malomed, and Lluis Torner, "Asymmetric solitons and domain walls supported by inhomogeneous defocusing nonlinearity," Opt. Lett. 37, 5000-5002 (2012)