Dromion Excitations in Self-Defocusing Optical Media

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2003,（2）
• 页码范围: 246-249
• 页数: 4页
• 语种: 英文

摘要

We investigate the nonlinear dynamics of multi-dimensional optical pulses propagating in an isotropic selfdefocusing medium. Using a method of multiple-scales we show that the nonlinear evolution of the pulses is governed by Davey-Stewartson equations. Dromion-like nonlinear localized structures (high-dimensional optical solitons) excited from a continuous wave background and decaying in all spatial directions are predicted through the interaction between a wavepacket superposed by short-wavelength components and a long-wavelength mean field generated by an optical rectification.