Electrically controllable photonic molecule laser.
We have studied the coherent intercavity coupling of the evanescent fields of two microdisk terahertz quantum-cascade lasers. The electrically controllable optical coupling of the single-mode operating lasers has been observed for cavity spacings up to 30 mum. The strongest coupled photonic molecule with 2 mum intercavity spacing allows to conditionally switch the optical emission by the electrical modulation of only one microdisk. The lasing threshold characteristics demonstrate the linear dependence of the gain of a quantum-cascade laser on the applied electric field.
Fasching
G
G
Photonics Institute, Vienna University of Technology, Gusshausstr 27, 1040 Wien, Austria. gernot.fasching@tuwien.ac.at
Deutsch
Ch
Ch
Benz
A
A
Andrews
A M
AM
Klang
P
P
Zobl
R
R
Schrenk
W
W
Strasser
G
G
Ragulis
P
P
Tamosiūnas
V
V
Unterrainer
K
K
D017076:Computer-Aided Design; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D008904:Miniaturization; D017785:Photons; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers