title: Rectified diode response of a multimode quantum cascade laser integrated terahertz transceiver.
abstract: We characterized the DC transport response of a diode embedded in a THz quantum cascade laser as the laser current was changed. The overall response is described by parallel contributions from the rectification of the laser field due to the non-linearity of the diode I-V and from thermally activated transport. Sudden jumps in the diode response when the laser changes from single mode to multi-mode operation, with no corresponding jumps in output power, suggest that the coupling between the diode and laser field depends on the spatial distribution of internal fields. The results demonstrate conclusively that the internal laser field couples directly to the integrated diode.
authors.affiliation: Sandia National Laboratories, P.O. Box 5800, Albuquerque, NM 87185, USA.
authors.forename: Gregory C
authors.initials: GC
authors.lastname: Dyer
authors.forename: Christopher D
authors.initials: CD
authors.lastname: Norquist
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Cich
authors.forename: Albert D
authors.initials: AD
authors.lastname: Grine
authors.forename: Charles T
authors.initials: CT
authors.lastname: Fuller
authors.forename: John L
authors.initials: JL
authors.lastname: Reno
authors.forename: Michael C
authors.initials: MC
authors.lastname: Wanke
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D054023:Lasers, Semiconductor; D018511:Systems Integration; D013685:Telecommunications / Q000295:instrumentation*; D055053:Terahertz Radiation