Towards Normal Incidence Intersubband Infrared Detection
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intersubband infrared photodetector QWIP↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Breakthrough Sensor Technology for Space Exploration in the 21st Century
The Breakthrough Sensors and Instrument Component Technology (BSICT) thrust area fosters the develop of breakthrough technology in the areas of detectors, sensors, lasers, coolers and electronics to enable a new set of exciting NASA missions in the new millennium.
BSICT NASA UV QWIP RADAR IR↗
ASTER and Beyond
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ASTER DEM NASA TIR QWIP EOS AM-1 MITI VNIR↗
Quantum Well Infrared Photodetectors: Device Physics and Light Coupling
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long wavelength infrared↗
Quantum Well Infrared Photodetectors: Device Physics and Light Coupling
It is customary to make infrared (IR) detectors in the long wavelength range by utilizing the interband transition which promotes an electron across the band gap (Eg) from the valence band to the conduction.
QWIPs wavelength well width barrier compositon car↗
Hyperspectral Thermal Emission Spectrometer: Engineering Flight Campaign
The Hyperspectral Thermal Emission Spectrometer (HyTES) successfully completed its first set of engineering test flights. HyTES was developed in support of the Hyperspectral Infrared Imager (HyspIRI). HyspIRI is one of the Tier II Decadal Survey missions. HyTES currently provides both high spectral resolution (17 nm) and high spatial resolution (2-5m) data in the thermal infrared (7.5-12 micron) part of the electromagnetic spectrum. HyTES data will be used to help determine the optimum band positions for the HyspIRI Thermal Infrared (TIR) sensor and provide antecedent data for HyspIRI related studies.
HyTES↗
Modulation Transfer Function of Infrared Focal Plane Arrays
Modulation transfer function (MTF) is the ability of an imaging system to faithfully image a given object. The MTF of an imaging system quantifies the ability of the system to resolve or transfer spatial frequencies. In this presentation we will discuss the detail MTF measurements of 1024x1024 pixels mid -wavelength and long- wavelength quantum well infrared photodetector, and 320x256 pixels long- wavelength InAs/GaSb superlattice infrared focal plane arrays (FPAs). Long wavelength Complementary Barrier Infrared Detector (CBIRD) based on InAs/GaSb superlattice material is hybridized to recently designed and fabricated 320x256 pixel format ROIC. The n-type CBIRD was characterized in terms of performance and thermal stability. The experimentally measured NE delta T of the 8.8 micron cutoff n-CBIRD FPA was 18.6 mK with 300 K background and f/2 cold stop at 78K FPA operating temperature. The horizontal and vertical MTFs of this pixel fully delineated CBIRD FPA at Nyquist frequency are 49% and 52%, respectively.
long-wave infrared↗
Quantum Well Infrared Photodetectors for Low Background Applications
High performance long-wavelength GaAs/AlxGa1-xAs quantum well infrared photodetectors for low background applications have been demonstrated.
quantum↗
A High Dynamic-range Low-noise Focal Plane Readout for VLWIR Applications Implemented with Current Mode Background Subtraction
Design and operation of an ultra-high dynamic-range, low noise CMOS focal plane readout circuit featuring in-pixel automatic background suppression is presented.
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