Abstract
Standard GaAs/AlGaAs Quantum Well IR Photodetectors (QWIP) are now well established for long wavelength IR (LWIR) detection. The first advantage of this technology is the duality with the technology of commercia GaAs devices. The realization of large focal plane arrays employing the standard III-V technological processes is already demonstrated. The second advantage widely claimed for QWIPs is the so-called band-gap engineering, allowing the custom design of the quantum structure to fulfill the requirements of specific applications like multispectral detection. In this paper, we present electro-optical results on Middle Wavelength IR (MWIR) detectors. We demonstrate the ability of QWIPs to cover the two spectral ranges. As the operating temperature is crucial for commercial thermal images, we report the temperature dependence of the performances of our MWIR QWIP detector up to 150 K. Performances of QWIPs in the MWIR with the implementation of the new skimming architecture are discussed.
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