Bistable Reflection Assisted by Fano Resonance in DMDMW With Low-Threshold and Large Modulation Depth

Owing to an additional thinner planar waveguide with micron scale is attracted the symmetrical metal cladding (SMCW) sub-millimeter scale, interference interaction between different Q-value guided modes would generate a Fano reflectivity curve. In our double metal-dielectric-metal waveguides (DMDMW) structure, Kerr nonlinear medium located in guiding layer of SMCW where excited oscillating wave enormously enhanced. Numerical calculations show that minute variation incident light intensity will give rise change dielectric constant and lead positive feedback. A bistable reflection can be achieved low threshold large modulation depth because sharpness asymmetricity