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.
THz emission of a 35-period superlattice. (Left) The amplitude of the THz waveform emitted for various applied bias voltages. (Right) As the electric field increases, the waveform develops a distinct oscillatory behavior demonstrating the existence of an oscillating dipole (9).
