基于表面等离子体激元纳米微腔的光学双稳态

Optical bistability in plasmonic nanocavities

在狭缝金属波导内放入非线性介质,利用非线性Kerr效应以及金属-非线性介质-金属所构成表面等离子体激元Fabry-Perot微腔形成的正反馈机制,在纳米尺度光子器件内实现光学双稳态。时域有限差分计算结果表明,由于表面等离子激元的局域增强效应,双稳态可以在低入射光强条件下发生。

Plasmonic Fabry-Perot nanocavity was constructed by filling a piece of optical nonlinear Kerr medium into the metal gap waveguide to realize optical bistability in nanodomain.Finite-difference time-domain simulations showed that the optical bistability effects could be observed in low incident power due to the local strong field of surface plasmon polaritons.