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Recently phase transitions in THz quantum wells inter-subband photodetectors (QWIP) were observed. Very large current discontinuities - up to five orders of magnitude - were obtained, at low temperature. Quantum well impact ionization shifts the structure from a resistive ldquodownrdquo state, where the current flows through inter-well quantum tunneling to a highly conductive ldquouprdquo state. In...
Performances of Quantum Cascade Detectors in the long wave infrared range (near 15 microns) will be studied for the first time. Due to their extremely low dark currents, Quantum Cascade Detectors are a promising candidate for the applications of imaging in this spectral range.
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