title: 4.3 μm quantum cascade detector in pixel configuration.
abstract: We present the design simulation and characterization of a quantum cascade detector operating at 4.3μm wavelength. Array integration and packaging processes were investigated. The device operates in the 4.3μm CO2absorption region and consists of 64 pixels. The detector is designed fully compatible to standard processing and material growth methods for scalability to large pixel counts. The detector design is optimized for a high device resistance at elevated temperatures. A QCD simulation model was enhanced for resistance and responsivity optimization. The substrate illuminated pixels utilize a two dimensional Au diffraction grating to couple the light to the active region. A single pixel responsivity of 16mA/W at room temperature with a specific detectivity D*of 5⋅107cmHz/W was measured.
authors.forename: A
authors.initials: A
authors.lastname: Harrer
authors.forename: B
authors.initials: B
authors.lastname: Schwarz
authors.forename: S
authors.initials: S
authors.lastname: Schuler
authors.forename: P
authors.initials: P
authors.lastname: Reininger
authors.forename: A
authors.initials: A
authors.lastname: Wirthmüller
authors.forename: H
authors.initials: H
authors.lastname: Detz
authors.forename: D
authors.initials: D
authors.lastname: MacFarland
authors.forename: T
authors.initials: T
authors.lastname: Zederbauer
authors.forename: A M
authors.initials: AM
authors.lastname: Andrews
authors.forename: M
authors.initials: M
authors.lastname: Rothermund
authors.forename: H
authors.initials: H
authors.lastname: Oppermann
authors.forename: W
authors.initials: W
authors.lastname: Schrenk
authors.forename: G
authors.initials: G
authors.lastname: Strasser