Petrović M, Jović D, Belić M, Schröder J, Jander Ph, Denz C
Institute of Physics, Post Office Box 57, 11001 Belgrade, Serbia.
Phys Rev Lett. 2005 Jul 29;95(5):053901. doi: 10.1103/PhysRevLett.95.053901. Epub 2005 Jul 25.
We demonstrate experimentally the existence of two transverse-dimensional counterpropagating (CP) incoherent spatial solitons in a 5 x 5 x 23 mm SBN:60Ce photorefractive crystal and investigate their dynamical behavior. We carry out numerical simulations that confirm our experimental findings. Substantially different behavior from the copropagating incoherent solitons is found. A symmetry breaking transition from stable overlapping CP solitons to unstable transversely displaced CP solitons is observed. We perform linear stability analysis that predicts the threshold for the split-up transition, in qualitative agreement with numerical simulations and experimental results.
我们通过实验证明了在一块5×5×23毫米的SBN:60Ce光折变晶体中存在两个横向维度反向传播（CP）的非相干空间孤子，并研究了它们的动力学行为。我们进行了数值模拟，证实了我们的实验结果。发现其行为与同向传播的非相干孤子有很大不同。观察到从稳定重叠的CP孤子到不稳定横向位移CP孤子的对称破缺转变。我们进行了线性稳定性分析，预测了分裂转变的阈值，这与数值模拟和实验结果在定性上是一致的。
