Figure 2.
(a) Schematic of an extrinsic FPI liquid RI sensor system based on a PCF lens, and (b) its reflection spectrum measured with an air cavity [35].
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.