Tunable Multi-switching in Plasmonic Waveguide with Kerr Nonlinear Resonator.
We propose a nanoplasmonic waveguide side-coupled with bright-dark-dark resonators in our paper. A multi-oscillator theory derived from the typical two-oscillator model, is established to describe spectral features as well as slow-light effects in bright-dark-dark structures, and confirmed by the finite-difference time domain (FDTD). That a typical plasmon induced transparency (PIT) turns to double PIT spectra is observed in this waveguide structure. At the same time, multi-switching effects with obvious double slow-light bands based on double PIT are also discovered in our proposed structure. What's more, dynamically tuning the multi-switching is achieved by means of filling Fabry-Perot resonators with the Kerr nonlinear material Ag-BaO. These results may have applications in all-optical devices, moreover, the multi-oscillator theory may play a guiding role in designing plasmonic devices.
College of Physics and Electronics, Central South University, Changsha 410083, China.
Zhihui
Z
He
College of Physics and Electronics, Central South University, Changsha 410083, China.|College of Materials Science and Engineering, Central South University, Changsha 410083, PR China.
Hongjian
H
Li
College of Physics and Electronics, Central South University, Changsha 410083, China.
Shiping
S
Zhan
College of Physics and Electronics, Central South University, Changsha 410083, China.
Boxun
B
Li
College of Physics and Electronics, Central South University, Changsha 410083, China.
Zhiquan
Z
Chen
College of Physics and Electronics, Central South University, Changsha 410083, China.
Hui
H
Xu