Interband-cascade infrared photodetectors with superlattice absorbers
Interband-cascade infrared photodetectors (ICIPs), composed of discrete superlattice
absorbers, are demonstrated at temperatures up to 350 K with a cutoff wavelength near 5 μ
m at 80 K to beyond 7 μ m above room temperature. The peak responsivity exceeds 200
mA/W, higher than the values reported from early interband cascade laser structures,
suggesting a significantly enhanced quantum efficiency of the superlattice absorbers. A
theoretical model, originally developed for quantum well infrared photodetectors (QWIPs), is …
absorbers, are demonstrated at temperatures up to 350 K with a cutoff wavelength near 5 μ
m at 80 K to beyond 7 μ m above room temperature. The peak responsivity exceeds 200
mA/W, higher than the values reported from early interband cascade laser structures,
suggesting a significantly enhanced quantum efficiency of the superlattice absorbers. A
theoretical model, originally developed for quantum well infrared photodetectors (QWIPs), is …
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