Quantum Well Infrared Photodetector Innovation Pathway
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چکیده
This case describes the development of quantum well infrared photodetectors (QWIPs). Following more than a decade of development, the QWIPs will fly aboard the Landsat Data Continuity Mission (LDCM) as part of the Thermal Infrared Sensor (TIRS). Over its history, Landsat data have enabled agricultural, forestry, air quality, and geological activity monitoring among other societal benefits. The new QWIPs technology will continue this legacy in the thermal infrared band, with improved sensitivity. The planned 2012 launch will mark the first implementation of a QWIPs-based sensor on a space-based platform, and one of the first applications of QWIPs principles in an infrared camera system in the relevant wavelength (8-12 μm) [DOC#12, INT#1]. The QWIP innovation has potential applications to a wide range of space and terrestrial missions [DOC#11].
منابع مشابه
The Effect of Structural Parameters on the Electronic States and Oscillator Strength of a Resonant Tunneling Quantum Well Infrared Photodetector
In this paper a resonant tunnelling quantum well infrared photodetector (RT-QWIP) is discussed. Each period of this photodetector structure comprises of a resonant tunnelling structure (AlAs/AlGaAs/AlAs) nearby a quantum well (AlGaAs/GaAs). In this photodetector, photocurrent is produced when an electron makes a transition from the ground state of the well to an excited state which is coupled t...
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The advent of nanophotonics allows devising and fabricating optical antenna as the advanced optical structures that can enhance light–matter interaction in quantum structures such as quantum wells. Improving infrared photodetector performance is discussed theoretically in this paper. We also investigate our recent demonstration of optical antenna integrated on quantum well infrared photodetecto...
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A 9 ~m cutoff 640x486 snap-shot quantum well infrared photodetector (QWIP) camera has been demonstrated. The performance of this QWIP camera is reported including indoor and outdoor imaging. Excellent imagery, with a noise equivalent differential temperature (NEAT) of 36 mK has been achieved at 300 K background.
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In this paper, a quantum well infrared photodetector based on cascade structure is proposed which is capable of simultaneous detection of two different wavelengths in mid-infrared region. The active region of this photodetector is monolithically sensitive to both wavelengths and the electron transport system is designed to transport electrons excited by two different wavelengths. By attachin...
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In this paper, we discuss the development of very sensitive very long wavelength infrared (VWIR) GaAs/AIXGal.XAs quantum well infrared photodetectors (QWIPS), fabrication of random reflectors for efficient light coupling, and the demonstration of a V WIR 128 x 128 focal plane array imaging camera. Excellent imagery, with a noise equivalent differential temperature (NEAT) of 30 mK has been achie...
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