研究了中心对称光折变晶体中Kagome光子晶格内带隙孤子的存在及其稳定性。结果表明:带隙孤子只存在于半无限带隙内,中功率的带隙孤子是稳定的,高功率和低功率的带隙孤子是不稳定的。在高功率和中功率区域内,带隙孤子的功率随传播常数的增加而减小。在低功率区域内,带隙孤子的功率随传播常数的增加而变大。

Gap solitons and their stability in Kagome photonic lattices with centrosymmetric photorefractive crystals are investigated. It is shown that these gap solitons exist only in the semi-infinite gap. Gap solitons are stable in the moderate power regions and unstable in the high and low power regions. The power of gap solitons decreases with an increase of the propagation constant in the high and moderate power regions and increases with the propagation constant in the low power region.