Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Reflection spectrum of the all-metal perfect absorber with the refractive index varying from 1 to 1.05 with a step interval of 0.01. (b) Resonant wavelength as a function of the surrounding low refractive index. The red line is the linear fitting with the slope representing the sensitivity S.
