Terahertz photonic crystal resonators in double-metal waveguides.
We present the design and the fabrication of photonic crystals with a complete bandgap for TM-modes used as a resonator for terahertz quantum-cascade lasers (QCL), which are lasing around 2.7 THz. The emission of the devices with and without a photonic crystal shows a shift in the emission from the gain maximum to the bandgap of the crystal. The devices are built up by a core, which provides the optical gain, and by a surrounding photonic crystal, which acts as a frequency selective mirror. The whole device is processed into a double-metal waveguide.
Benz
A
A
Fasching
G
G
Deutsch
Ch
Ch
Andrews
A M
AM
Unterrainer
K
K
Klang
P
P
Schrenk
W
W
Strasser
G
G