Highly intensity enhancement of surface plasmon (SP) and hybridity surface plasmoms (HSP) modes

We develop a more effective and uncomplicated optical component which consists of the waveguide coupler and gold thin films to improve the enhancement of HSP and SP modes than other typical components and explain the principle and characteristic of the component in our letter. In the particular resonant conditions, i.e., the specific distance between the waveguide and the metal thin film, for our component, the intensity enhancement of the gold surface can guarantee to rise up to four times. Moreover, the enhancement is magnified between the red light and the infrared as optical amplitude amplifications.