Ming LIU, Cong-Ya YOU, Jing-Feng LI, Fa-Ran CHANG, Tao WEN, Nong LI, Peng ZHOU, Yu CHENG, Guo-Wei WANG. Research on InAs/GaSb type-II superlattice dual-band long-/long-wavelength infrared photodetector[J]. Journal of Infrared and Millimeter Waves, 2023, 42(5): 574
- Journal of Infrared and Millimeter Waves
- Vol. 42, Issue 5, 574 (2023)
Fig. 1. Schematic of long-/long-wavelength dual-band photodetector architecture and corresponding energy band structure
Fig. 2. （a）Growth sequence of 10.5 ML InAs/ 7 ML GaSb interface，（b）growth sequence of 14 ML InAs/ 7 ML GaSb interface
Fig. 3. Surface morphology of long-/long-wavelength dual-band superlattice materials（a）sample #1 and（b）sample #2
Fig. 4. AFM image of long-/long-wavelength dual-band superlattice materials（a）sample #1 and（b）sample #2
Fig. 5. XRD image of long-/long-wavelength dual-band superlattice
Fig. 6. （a）Microscopic image of 320×256（30μm）long-/long-wavelength dual-band superlattice photodetector，and（b）scanning electron micrograph of focal pixel array.
Fig. 7. Characterization of J-V and RA-V curves
Fig. 8. Spectral response of superlattice dual-band long-/long-wavelength infrared photodetector
Fig. 9. Infrared imagings of dual-band FPA (a) Band-1 channel imaging (b)Band-2 channel imaging
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Table 1. The XRD peaks, periodic thicknesses and design match of superlattice
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