title: Electrically controllable photonic molecule laser.
abstract: 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.
authors.affiliation: Photonics Institute, Vienna University of Technology, Gusshausstr 27, 1040 Wien, Austria. gernot.fasching@tuwien.ac.at
authors.forename: G
authors.initials: G
authors.lastname: Fasching
authors.forename: Ch
authors.initials: Ch
authors.lastname: Deutsch
authors.forename: A
authors.initials: A
authors.lastname: Benz
authors.forename: A M
authors.initials: AM
authors.lastname: Andrews
authors.forename: P
authors.initials: P
authors.lastname: Klang
authors.forename: R
authors.initials: R
authors.lastname: Zobl
authors.forename: W
authors.initials: W
authors.lastname: Schrenk
authors.forename: G
authors.initials: G
authors.lastname: Strasser
authors.forename: P
authors.initials: P
authors.lastname: Ragulis
authors.forename: V
authors.initials: V
authors.lastname: Tamosiūnas
authors.forename: K
authors.initials: K
authors.lastname: Unterrainer
mesh_terms: 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