Fig. 1. Schematic energy band diagram of InAs/GaSb superlattice

Fig. 2. Relationship between the cut-off wavelengths and InAs layer thicknesses of InAs/GaSb T2 SLs (The GaSb layer is 2.1 nm)

Fig. 3. Schematic energy band diagram of CBIRD structure at zero bias voltage (The red solid line is the conduction band edge, the blue dashed line is the heavy-hole valence band edge, and the black dashed line is the Fermi level) ^[18-20]

Fig. 4. SEM of superlattice detector with 5 μm pixel pitch^[32]

Fig. 5. Photographs of mid-wave infrared superlattice focal plane imaging at 160 K and 170 K operating temperatures^[33]

Fig. 6. Photographs of two-color superlattice infrared detectors with operating temperature of 80 K and optical system F number of 4^[37]

Fig. 7. The visible (from Google map) and CTI infrared images (captured by NASA's International Space Station) of an Africa region, the Band 1 is the mid-wave infrared image, and the Band 2 is the long-wave infrared image^[38]