Refraction and Reflectivity

b) Refraction

When light moves from one medium to another as in the figure to the right, it changes direction. it is refracted

.A double-periodic array of pairs of parallel gold nanorods is shown to have a negative refractive index in the optical range. 

Such behavior results from the plasmon resonance in the pairs of nanorods for both the electric and the magnetic components of light. 

The refractive index is retrieved from direct phase and amplitude measurements for transmission and reflection, which are all in excellent agreement with simulations.

c) Reflectivity

Apart from the transmitted light there is also a reflected part. 

The reflection angle is equal to the incidence angle, and the amount of light that is reflected is determined by the reflectivity of the surface.

Refraction

• The refractive index is retrieved from direct phase and amplitude measurements for transmission and reflection, which are all in excellent agreement with simulations.
• When light moves from one medium to another as in the figure to the right, it changes direction, it is refracted.
• A double-periodic array of pairs of parallel gold nanorods is shown to have a negative refractive index in the optical range. 
• Such behavior results from the plasmon resonance in the pairs of nanorods for both the electric and the magnetic components of light. 

Reflectivity

• Apart from the transmitted light there is also a reflected part. 
• The reflection angle is equal to the incidence angle, and the amount of light that is reflected is determined by the reflectivity of the surface.