title: Quantum cascade detector utilizing the diagonal-transition scheme for high quality cavities.
abstract: A diagonal optically active transition in a quantum cascade detector is introduced as optimization parameter to obtain quality factor matching between a photodetector and a cavity. A more diagonal transition yields both higher extraction efficiency and lower noise, while the reduction of the absorption strength is compensated by the resonant cavity. The theoretical limits of such a scheme are obtained, and the impact of losses and cavity processing variations are evaluated. By optimizing the quantum design for a high quality cavity, a specific detectivity of 10(9) Jones can be calculated for λ = 8μm and T = 300K.
authors.forename: P
authors.initials: P
authors.lastname: Reininger
authors.forename: B
authors.initials: B
authors.lastname: Schwarz
authors.forename: R
authors.initials: R
authors.lastname: Gansch
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: W
authors.initials: W
authors.lastname: Schrenk
authors.forename: G
authors.initials: G
authors.lastname: Strasser