Spontaneous symmetry breaking in a double-defect nonlinear grating

C. Martijn De Sterke, Irina V. Kabakova, Ishraq Uddin, Jonathan Jeyaratnam, Boris A. Malomed

Research output: Contribution to journalArticlepeer-review


We study spontaneous symmetry breaking in localized modes trapped by a pair of defects embedded in a Bragg grating written in a Kerr-nonlinear material. While the system has two symmetric modes at low energies, the nonlinearity renders one of these unstable in favor of an asymmetric mode emerging at sufficiently high energies. Using a simple semianalytic model, we explain this transition as originating from the degeneracy between a state in a grating with two defects and state in a grating with a single defect.

Original languageEnglish
Article number033825
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - 13 Sep 2013


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