基于量子阱效应的光开关(英文)  

A Switching Mechanism Based on Photonic Quantum-well Effects

作　　者：刘丹东[1] 陈光德[1] 徐忠锋[1] 

机构地区：[1]西安交通大学理学院,西安710049

出　　处：《光子学报》2006年第9期1321-1324,共4页Acta Photonica Sinica

摘　　要：把三块各带有一个缺陷的光子晶体结合起来,如果中央晶体的缺陷模处在两侧晶体的禁带中,缺陷模内的光波会受到两侧晶体的阻碍并被局域在中央晶体内,形成量子阱结构;若一侧晶体的缺陷模被移动到中央晶体缺陷模处,则只有一侧晶体阻碍在中央晶体缺陷模内传播的光波,量子阱效应完全消失,光的传输受到最大程度的阻碍.这种结构可同时具有窄带滤波器和光开关的功能,据此提出了一种高效的、灵敏的光开关的设计.采用传输矩阵法计算了一维光子晶体的透射谱和场分布.Photonic quantum-well （QW） structures can be constructed by stacking 3 photonic crystals （PCs） with the same photonic band gap and different defect modes. On condition that the defect mode of the PC in the well region is located into nontransmission frequency ranges of the PCs in the barrier regions, the confined photonic state appears and can completely transmit through the structure by tunneling. However, its transmission will be strongly prohibited due to vanishing of the photonic QW induced by shifting the defect mode frequency of either of the PCs in the surrounded regions to that of the middle PC. Switching and narrow band filtering can be realized simultaneously with the structure. The theoretical calculation has been carried out by transfer matrix methods.

关 键 词：光子晶体 量子阱 缺陷态 光开关 滤波 

分 类 号：O734[理学—晶体学]