Title of article :
Narrow spectral band monolithic lead chalcogenide on Si mid-IR photodetectors
Author/Authors :
Zogg، نويسنده , , Hans and Arnold، نويسنده , , Martin، نويسنده ,
Abstract :
Resonant cavity-enhanced detectors (RCEDs) with a narrow linewidth and high peak quantum efficiency have been realized for the first time in the mid-IR range. The detectors are fabricated with epitaxial narrow gap lead chalcogenide layers grown epitaxially on Si-substrates. They consist of an epitaxial bottom distributed Bragg mirror, a spacer layer, and the thin absorber layer followed by a metal top layer which forms the photovoltaic detector and in addition acts as top mirror. Devices with peak wavelengths varying from 4 to 8 μm, spectral widths below 1% and quantum efficiencies above 30% have been realised.
Keywords :
Resonant cavity , Lead chalcogenide , epitaxy , Infrared Detectors
Journal title :
Astroparticle Physics