title: Highly selective two-color mid-wave and long-wave infrared detector hybrid based on Type-II superlattices.
abstract: We report a two-color mid-wave infrared (MWIR) and long-wave infrared (LWIR) co-located detector with 3 μm active region thickness per channel that is highly selective and can perform under high operating temperatures for the MWIR band. Under back-side illumination, a temperature evolution study of the MWIR detector's electro-optical performance found the 300 K background-limit with 2π field-of-view to be achieved below operating temperatures of 160 K, at which the temperature's 50% cutoff wavelength was 5.2 μm. The measured current reached the system limit of 0.1 pA at 110 K for 30 μm pixel-sized diodes. At 77 K, where the LWIR channel operated with a 50% cutoff wavelength at 11.2 μm, an LWIR selectivity of ~17% was achieved in the MWIR wave band between 3 and 4.7 μm, making the detector highly selective.
authors.affiliation: Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: Edward Kwei-wei
authors.initials: EK
authors.lastname: Huang
authors.forename: Minh-Anh
authors.initials: MA
authors.lastname: Hoang
authors.forename: Guanxi
authors.initials: G
authors.lastname: Chen
authors.forename: Shaban
authors.initials: S
authors.lastname: Ramezani-Darvish
authors.forename: Abbas
authors.initials: A
authors.lastname: Haddadi
authors.forename: Manijeh
authors.initials: M
authors.lastname: Razeghi