The AlInAs/InGaAs material system is promising for mid-wavelength infrared (MWIR) and multi-band quantum well infrared photodetectors (QWIPs) as a lattice-matched alternative to the strained AlGaAs/InGaAs system. In this paper, we report a large format (640 512) AlInAs/InGaAs QWIP focal plane array (FPA) with 4.9 m cut-off wavelength and assess the performance of this material system oakley holbrook for MWIR QWIP applications at both pixel and large format FPA level.
We also experimentally demonstrate that the cut-off wavelength of AlInAs/InGaAs QWIPs can be tuned in a sufficiently large range in the MWIR atmospheric window by changing only the quantum well oakley prescription glasses frames uk (QW) width at the lattice-matched oakley prescription glasses uk online composition. The cut-off wavelength is shifted from 4.15 to 4.9 m when the QW oakley jawbreaker review width is decreased from 30 to 23,… in which case a very broad spectral response (Δλ/λp = 32%) with a reasonably high peak detectivity (5.5 1010 cm Hz1/2 W−1, f /1.5) is achievable.
The AlInAs/InGaAs QWIP FPA yielded excellent oakley uk ltd sensitivity with a noise equivalent temperature difference as oakley ski goggles low as 22 mK and a background limited performance (BLIP) temperature as high as 115 K with f /1.5 aperture and 300 K background. The results clearly demonstrate the potential of this material system for completely lattice-matched dual- or multi-band QWIP FPAs for third-generation thermal imagers.
