Zhang Wei, Chen Yuanyuan, Hou Peng, Shi Jielong, Wang Qi
Department of Physics, Shanghai University, Shanghai, People's Republic of China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Dec;82(6 Pt 2):066601. doi: 10.1103/PhysRevE.82.066601. Epub 2010 Dec 10.
Nonlinear propagation characteristics are investigated theoretically in a one-dimensional photonic band-gap structure doped with a nonlinear indefinite metamaterial defect for five distinct frequency intervals. It is found from the electric field distribution that there exists the bright gap solitonlike when the nonlinear indefinite metamaterial defect is a cut-off medium, while the dark gap solitonlike can appear in the nonlinear never cut-off defect layer. It is also found that there exists corresponding bistable lateral shift the properties of which are strongly dependent on the permittivity and permeability of nonlinear indefinite metamaterials. Moreover, in contrast to the switch-down threshold value, the switch-up threshold value is more sensitive to the incident frequency.
研究了在一维光子带隙结构中掺杂非线性不定型超材料缺陷时，五个不同频率区间的非线性传播特性。从电场分布发现，当非线性不定型超材料缺陷为截止介质时，存在亮隙孤子样，而暗隙孤子样可出现在非线性非截止缺陷层中。还发现存在相应的双稳横向位移，其特性强烈依赖于非线性不定型超材料的介电常数和磁导率。此外，与关断阈值相比，开启阈值对入射频率更敏感。
