| n this work, three types of dual-band n-type quantum well infrared photodetectors (QWIPs) have been developed for 3-5 ;We demonstrated a new voltage-tunable multicolor triple-coupled quantum well infrared photodetector (TC-QWIP) for LWIR detection. Using quantum confined Stark shift effect, the wavelengths tunability of two QWIPs by changing applied bias voltage is demonstrated in the wavelength range of 8.2-9.1 ;A high-strain two-slack, two-color QWIP has been demonstrated with high performance. The device has 35% of indium in the QW of the MWIR stack which produces high in-plane compressive strain. The detection peak wavelengths are at 4.3 ;Characterizations of a two-stack indirect-barrier/triple-coupled (IB/TC)-QWIP, with two different doping densities ;Finally, we demonstrated a very high performance TC-QWIP using high-strain (HS-) n-type... |
