Three-stack, three-color quantum-well infrared photodetector for mid-, long-, and very long-wavelength infrared detection

Jiang, Lin; Li, Sheng S.; Tidrow, M. Z.; Dyer, W. R.; Liu, W. K.; Fastenau, J. M.; Yurasits, T. R.
October 2001
Applied Physics Letters;10/29/2001, Vol. 79 Issue 18, p2982
Academic Journal
A high-performance three-stack, three-color quantum-well infrared photodetector for the mid-, long-, and very long-wavelength infrared detection has been developed in this work. The detection bandwidths with full-width at half-maximum are 5.9–7.0, 9.1–11.2, and 12.2–16.9 μm, which cover the major portion or entire range of the three atmospheric blocking bands: the water band (5.5–7.5 μm), the ozone band (9.4–9.9 μm), and the carbon dioxide band (14–16 μm). Values of the dark-current detectivity were found to be D[sup *]=8.5×10[sup 12] cm Hz[sup 1/2]/W at T=40 K, V[sub b]=-1.3 V, and λ[sub p]=6.5 μm for the mid-wavelength infrared stack; D[sup *]=1.5×10[sup 10] cm Hz[sup 1/2]/W at T=40 K, V[sub b]=-1.4 V, and λ[sub p]=10.1 μm for the long-wavelength infrared stack, and D[sup *]=1.2×10[sup 11] cm Hz[sup 1/2]/W at T=30 K, V[sub b]=-1.1 V, and λ[sub p]=15.1 μm for the very long-wavelength infrared stack. © 2001 American Institute of Physics.


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