Concepedia

Mid-infrared detectors in the 3–5 μm band using bound to continuum state absorption in InGaAs/InAlAs multiquantum well structures

G. Hasnain, B. F. Levine, D. L. Sivco, A. Y. Cho

Applied Physics Letters · 1990 · 79 citations · 11 references

Abstract

Medium wavelength infrared (MWIR) detectors in the 3–5 μm band are demonstrated using bound to continuum state intersubband absorption in lattice-matched InGaAs/InAlAs multiquantum well (MQW) structures. Photodetectors with responsivity peaked at 4 μm wavelength showed low dark current giving a background-limited detectivity D*BL =2.3×1010 cm(Hz)1/2 /W at temperatures up to 120 K.

References

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Engineering, New Type, Multiple Quantum Wells +18