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.
Resonant frequency spectrum of mode 27 with respect to the change of core medium permittivity ɛs. From left to right, the curves correspond to ɛs = 1, 1.02, 1.04, 1.06, 1.08 and 1.1, respectively. (a) The traditional microring sensor. (b) The metamaterial sensor.
