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Showing 1 to 20 of 29 for “"infrared detection"”.
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MULTICOLOR INFRARED DETECTION USING STEP QUANTUM WELLS
Quantum well infrared photodetectors (QWIPs) based on intersubband transitions are widely investigated in recent years. Due to the mature III-V material and processing technology, great progress has been made successfully for the fabrication of large scale quantum well infrared focal plane arrays …
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Antimonide-based type-II superlattices for infrared detection
The vast array of applications for the detection of mid- to long-wave infrared radiation has spurred continuous interest in new and novel technologies to replace the current generation of state-of-the-art devices such as mercury cadmium telluride (MCT) detectors. One of the more promising …
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Defect characterization of antimonide-based type-II superlattices for infrared detection
… since their initial proposed use for the detection of mid- to long-wavelength infrared (MWIR, LWIR) radiation. The type-II broken band gap alignment of these heterostructures allows electrons and holes to be confined in separate but adjacent, nanometer scale thickness, material layers. …
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Development of antenna-coupled metal-insulator-metal diodes for infrared detection
The long-wavelength infrared (LWIR) band between 7 and 14 µm is significant for thermal imaging purposes because it coincides with the blackbody radiation peak of the human body and a low absorption window in the earth’s atmosphere. Also, at 10 µm wavelength, the earth’s terrestrial radiation is …
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Ultra-sensitive Mid-infrared Detection Using Phononic Crystal Resonator-based Oscillator
Mid-infrared (MIR) detection is essential for many applications such as chemical sensing, communications, space explorations, and national defense. Existing MIR detectors are typically categorized into two major classes: (1) semiconductor photodetectors, which offer high responsivity and fast …
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Nanosecond Response-Time. Room Temperature Infrared Detection With Thin-Film Metal Bolometers
Made available in DSpace on 2014-12-10T19:07:11Z (GMT). No. of bitstreams: 1 7317507.pdf: 3838764 bytes, checksum: 2eb23bc60eec68cc83f66205b2e85087 (MD5) Previous issue date: 1973
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Measurement of 'one over f noise' in infrared detection using a novel technique
… in Mercury Cadmium Telluride (HgCdTe) infrared devices. It is therefore imperative to be able to measure and account for its contribution to the total device noise. In this thesis, the 1/f noise of a HgCdTe device is measured and studied using two measurement techniques. The first …
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Liquid Phase Epitaxial Indium-Gallium-Arsenide - Phosphide Avalanche Photodiodes for Near-Infrared Detection
… of InGaAsP/InP avalanche photodiodes for near-infrared detection is described in detail. Particular material requirements which must be satisfied for these devices are considered and the special techniques involved in the use of liquid phase epitaxy which have been developed for preparing such …
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Infrared detection properties of Si P-I-N diodes doped with deep levels
Made available in DSpace on 2017-11-30T22:11:07Z (GMT). No. of bitstreams: 2 6070599.pdf: 33209903 bytes, checksum: 162575177826612629aa81702d567d78 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1969
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Characterization and optimization of supercritical fluid chromatography with on-line Fourier transform infrared detection
… for SFC. The interface of a Fourier Transform Infrared (FTIR) spectrometer to a packed column (analytical scale) SFC is demonstrated. Characterization of mobile phases for SFC-FTIR is presented. Also, parameters for the optimization of spectral sensitivity, such as mobile phase transparency and …
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Atomic structure and defects of III-V compound semiconductor strained-layer-superlattices for infrared detection
There are considerable interests in the use of infrared (IR) photodetectors, in particular mid- and long-wavelength IR detection, for diverse scientific, civil, and military applications. Devices based on the InAs/GaSb or InAs/InAsSb strained-layer-superlattices (SLSs) have gained special attention …
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Study of quantum dot and quantum well photodetectors
A study of quantum dots-in-well infrared photodetectors (QDIPs) yields results useful for the creation of a two-colour QDIP. Quantum dot infrared photodetectors (QDIPs) have been shown to be a key technology in mid and long wavelength infrared detection due to their potential for normal incidence …
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Infrared detectors based on two-dimensional materials and heterostructures
… interaction phenomena and developing advanced infrared detection technologies enabled by 2D materials and their heterostructures. First, we addressed some of the key challenges for reliable synthesis and characterization of 2D materials and functional nanostructures. We developed a new …
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Analysis of Near-Infrared Phase Effects on Biometric Iris Data
… potential iris scan data variations from near infrared waves derived from fluorescent illumination. Prior studies of iris data variances from infrared wave interference of halogen, incandescent, and sunlight with iris cameras suggest that similar changes may exist under near infrared …
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Multispectral plasmon enhanced quantum dots in a well infrared photodetectors
Infrared detectors in 3-5 μm and 8-12 μm regions are extensively used for applications in remote sensing, target detection and medical diagnostics. Detectors using intersubband transitions in the quantum dots in a well (DWELL) system for infrared detection have gained prominence recently, owing to …
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Antimony-based type-II superlattice infrared photodetectors on indium-arsenide substrates
The wide variety of applications for mid- and far-infrared detection has spurred the study of cutting-edge technologies for use in the next genera- tion of detectors in place of the current systems, such as mercury cadmium telluride. While type-II superlattices over a number of advantages in design …
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Graphene for radio frequency electronics and infrared thermal imaging
… this thesis involves exploring graphene as a new infrared photoactive and thermally sensitive material for sensors in the IR spectrum (80 meV < Eph < 250 meV), which have applications ranging from thermography and night vision systems to nanoscale chemical spectroscopy. In this thesis, we will …
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Defect investigations in InAs/GaSb type-II strained layer superlattice
… layer superlattices are a material used for infrared detection. By adjusting the thickness of the InAs and GaSb layers, the material bandgap can be tuned to absorb photons from 3-30 um. Compared to competing materials such as HgCdTe and InSb, InAs/GaSb superlattices are more mechanically …
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Antenna-coupled Infrared And Millimeter-wave Detectors: Fabrication, Measurement And Optimization
… provide uncooled, cost-effective solutions for infrared and millimeter-wave imaging. This work describes the design, fabrication, measurement, and optimization of several types of antenna-coupled detectors for LWIR (8 - 12 µm) and 94 GHz radiation. Two types of millimeter-wave …
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Engineered quantum dots for infrared photodetectors
Quantum Dot Infrared Photodetector (QDIP) Focal Plane Arrays (FPAs) have been proposed as an alternative technology for the 3rd generation FPAs. QDIPs are emerging as a competitive technology for infrared detection and imaging especially in the midwave infrared (MWIR) and longwave infrared (LWIR) …
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