Dynamically tunable slow light based on plasmon induced transparency in disk resonators coupled MDM waveguide system
Dynamically tunable slow light based on plasmon induced transparency in disk resonators coupled MDM waveguide system
复制标题
基于圆盘谐振器耦合 MDM 波导系统中等离激元诱导透明度的动态可调慢光
DOI：
10.1088/0022-3727/48/23/235102
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发表时间：
2015-06-17
影响因子：
3.4
通讯作者：
Tang, Jian
中科院分区：
文献类型：
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作者：
Han, Xu;Wang, Tao;Tang, Jian
采用非线性光学Kerr介质耦合金属-介电介质-金属（MDM）波导系统，研究了圆盘谐振腔中基于等离子体诱导透明（坑）的超快、低功耗动态可调谐单通道和多通道慢光。引入了耦合模理论（CMT）来分析这种动态可调谐的单通道慢光结构。在这种基于明暗模式耦合机制的等离子体波导结构中实现了多通道慢光。为了降低泵浦强度，获得超快的响应时间，传统的非线性克尔材料被单层石墨烯取代。结果表明，通过将泵浦强度从11.7 MW cm−2动态降低到4.4 MW cm−2，单个PIT窗口的大小可以控制在0.08 ~ 0.48之间，相应的群指数可以控制在14.5 ~ 2.0之间。此外，该结构还存在相移倍增效应。这项工作为实现高度集成的光电路和网络，特别是波长选择、全光存储和非线性器件开辟了新的途径。
Ultrafast and low-power dynamically tunable single channel and multichannel slow light based on plasmon induced transparencies (PITs) in disk resonators coupled to a metal-dielectric-metal (MDM) waveguide system with a nonlinear optical Kerr medium is investigated both numerically and analytically. A coupled-mode theory (CMT) is introduced to analyze this dynamically tunable single channel slow light structure. Multichannel slow light is realized in this plasmonic waveguide structure based on a bright–dark mode coupling mechanism. In order to reduce the pump intensity and obtain ultrafast response time, the traditional nonlinear Kerr material is replaced by monolayer graphene. It is found that the magnitude of the single PIT window can be controlled between 0.08 and 0.48, while the corresponding group index is controlled between 14.5 and 2.0 by dynamically decreasing pump intensity from 11.7 to 4.4 MW cm−2. Moreover, the phase shift multiplication effect is found in this structure. This work paves a new way towards the realization of highly integrated optical circuits and networks, especially for wavelength-selective, all-optical storage and nonlinear devices.