Figure 4.
Sum frequency generation scheme. (A) Sum frequency generation occurs at an interface when two pulsed laser beams interact; (B) The SF frequency emitted is at the sum of the visible and the infrared incident frequencies (ωVis + ωIR = ωSF).
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.