Giant Kerr nonlinearity and low-power gigahertz solitons via plasmon-induced transparency.
We propose a method to enhance Kerr nonlinearity and realize low-power gigahertz solitons via plasmon-induced transparency (PIT) in a new type of metamaterial, which is constructed by an array of unit cell consisting of a cut-wire and a pair of varactor-loaded split-ring resonators. We show that the PIT in such metamaterial can not only mimic the electromagnetically induced transparency in coherent three-level atomic systems, but also exhibit a crossover from PIT to Autler-Townes splitting. We further show that the system suggested here also possess a giant third-order nonlinear susceptibility and may be used to create solitons with extremely low generation power. Our study raises the possibility for obtaining strong nonlinear effect of gigahertz radiation at very low intensity based on room-temperature metamaterials.
State Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China.
Zhengyang
Z
Bai
State Key Laboratory of Precision Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China.
Guoxiang
G
Huang
School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK.
Lixiang
L
Liu
School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK.
Shuang
S
Zhang