光学学报, 2017, 37 (7): 0726003, 网络出版: 2017-07-10
非互易光传输方向的主动调控
Active Control of Nonreciprocal Optical Transmission Direction
物理光学 主动调控 传递矩阵法 非互易传输 Tamm态等离子体激元 石墨烯光子晶体 physical optics active control transfer matrix method nonreciprocal transmission Tamm plasmon polaritons graphene photonic crystal
摘要
为实现非互易光传输的主动控制,提出了一种基于石墨烯光子晶体和磁光半导体材料的结构,通过对磁光半导体外加磁场,打破时间反转对称,获得了非互易的磁Tamm态等离子体激元(MTPP)。通过分析不同条件下的透射谱,研究了结构参数、外加磁场,以及石墨烯化学势对MTPP的影响。结果表明,通过调控外加磁场和石墨烯化学势,可以实现单向光传输的主动控制以及正、反双向光传输的灵活转换。该结构及其调控方法在光二极管和光开关等应用领域具有潜在的应用价值。
Abstract
In order to realize the active control of nonreciprocal optical transmission, a structure based on graphene photonic crystals and magneto-optical semiconductor materials is proposed. By adding external magnetic field on the magneto-optical semiconductor, the time-reversal symmetry is broken which contributes to the obtainment of nonreciprocal magnetic Tamm plasmon polaritons (MTPP). The influences of structural parameters, external magnetic field and graphene chemical potential on the MTPP are studied by analyzing the transmission spectra under different conditions. The results show that the active control of the unidirectional wave and the flexible switch between one-way forward and one-way backward transmission can be realized by modulating the external magnetic field and graphene chemical potentials. This structure and its modulation method have promising applications in optical diodes and optical switches.
任坤, 范景洋, 任晓斌. 非互易光传输方向的主动调控[J]. 光学学报, 2017, 37(7): 0726003. Ren Kun, Fan Jingyang, Ren Xiaobin. Active Control of Nonreciprocal Optical Transmission Direction[J]. Acta Optica Sinica, 2017, 37(7): 0726003.