Quantum oscillations in HgTe.
Quantum oscillation of magnetoresistivity in n-type mercury telluride crystals, obtaining electron mass
N-TYPE SEMICONDUCTOR↗
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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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Defects in the compound Bi sub 2 Te sub 3 caused by irradiation with protons.
Defects in single crystal foils of compound bismuth telluride caused by irradiation with protons
POINT DEFECT↗
High Speed, Multi-Channel, Thermal Instrument Development in Support of HyspIRI-TIR
The Jet Propulsion Laboratory is currently developing an end-to-end instrument which will provide a proof of concept prototype vehicle for a high data rate, multi-channel, thermal instrument in support of the Hyperspectral Infrared Imager (HyspIRI)-Thermal Infrared (TIR) space mission. HyspIRI mission was recommended by the National Research Council Decadal Survey (DS). The HyspIRI mission includes a visible shortwave infrared (SWIR) pushboom spectrometer and a multispectral whiskbroom thermal infrared (TIR) imager. The prototype testbed instrument addressed in this effort will only support the TIR. Data from the HyspIRI mission will be used to address key science questions related to the Solid Earth and Carbon Cycle and Ecosystems focus areas of the NASA Science Mission Directorate. Current designs for the HyspIRI-TIR space borne imager utilize eight spectral bands delineated with filters. The system will have 60m ground resolution, 200mK NEDT, 0.5C absolute temperature resolution with a 5-day repeat from LEO orbit. The prototype instrument will use mercury cadmium telluride (MCT) technology at the focal plane array in time delay integration mode. A custom read out integrated circuit (ROIC) will provide the high speed readout hence high data rates needed for the 5 day repeat. The current HyspIRI requirements dictate a ground knowledge measurement of 30m, so the prototype instrument will tackle this problem with a newly developed interferometeric metrology system. This will provide an absolute measurement of the scanning mirror to an order of magnitude better than conventional optical encoders. This will minimize the reliance on ground control points hence minimizing postprocessing (e.g. geo-rectification computations).
Multi-spectral↗
Photoemission studies of the electronic structure of CdTe, CdSe, and CdS
Electronic structure photoemission studies of cadmium telluride, cadmium selenide, and cadmium sulfide
CADMIUM COMPOUND↗
Parametric analysis of radioisotope thermoelectric generators
A parametric analysis of a radioisotope-thermoelectric power generator is presented. A cylindrical heat-source geometry was assumed with either lead telluride or silicon-germanium thermoelectric elements located around the lateral surface of the fuel block. Generator performance, rather than overall power-system performance, was analyzed; that is, such mission dependent considerations as nuclear shielding, reentry protection, and power conditioning were not included.
James J. Ward↗
Research on field-effect transistor stress transducers Semiannual status report, 1 Jul. - 31 Dec. 1967
Insulated gate field effect transistors using cadmium selenide or telluride as piezoelectric semiconductor material
Muller, R. S.↗
Cascaded thermoelectric test generator, phase 1 Quarterly progress report, Feb. 23 - May 31, 1968
Cascaded silicon-germanium/lead telluride thermoelectric test generator
Source record↗
The pseudobinary section of PbTe and gold.
Pseudobinary section of lead telluride and gold, discussing reaction direction
Mottern, D. J.↗
P-n junctions formed in gallium antimonide
Vapor phase deposition process forms a heavily doped n-region on a melt-grown p-type gallium antimonide substrate. HCl transports gallium to the reaction zone, where it combines with antimony hydride and the dopant carrier, hydrogen telluride. Temperatures as low as 400 degrees C are required.
Clough, R.↗
Transit power supply
Radioisotope thermoelectric generator with lead telluride converter, discussing intact reentry and impact capability, refractory construction and reliability
Jones, I. R.↗
Cs2Te standard cell development and electronic characteristics of silver halides Quarterly status report, period ending 31 Oct. 1970
Production of cesium-telluride for measurement of ultraviolet radiation intensity
Spicer, W. E.↗
Two-color photoconductive detectors
Two color sandwiched photoconductive mercury-cadmium-telluride far infrared detectors
Reynolds, J. W.↗
Intracavity CdTe modulators for CO2 lasers.
The use of cadmium telluride as an electrooptic material for intracavity modulation of CO2 lasers is described. Included are the predicted and measured effects of CdTe intracavity modulators on laser performance. Coupling and frequency modulation are discussed and experimental results compared with theoretically predicted performance for both techniques. Limitations on the frequency response of the two types of modulation are determined.
Kiefer, J. E.↗
Photodiodes for ten micrometer laser communication systems
The performance is discussed of 10-micron mercury-cadmiumtelluride and lead-tin-telluride photodiodes in laser heterodyne communication systems. The dependence of detector quantum efficiency, resistance, frequency response, and signal-to-noise ratio on temperature, bias, and local oscillator power are examined. Included in the discussion is an analysis of the feasibility of high temperature operation, and ability of the detector to dissipate power to a heat sink is explored. Some aspects of direct detection response are considered and figures showing flux levels from a blackbody presented.
Cohen, S. C.↗
Fluorescence and phosphorescence of photomultiplier window materials under electron irradiation
The fluorescence and phosphorescence of photomultiplier window materials under electron irradiation were investigated using a Sr-90/Y-90 beta emitter as the electron source. Spectral emission curves of UV grade, optical grade, and electron-irradiated samples of MGF2 and LiF, CaF2, BaF2, sapphire, fused silica, and UV transmitting glasses were obtained over the spectral range of 200 nm to 650 nm. Fluorescence yields, expressed as the number of counts in a solid angle of 2 pi steradian per 1MeV of incident electron energy deposited, were determined on these materials utilizing photomultiplier tubes with cesium telluride, bialkali, and trialkali (S-20) photocathodes, respectively.
Viehmann, W.↗
Nuclear quadrupole resonance studies in semi-metallic structures
Both experimental and theoretical studies are presented on spectrum analysis of nuclear quadrupole resonance of antimony and arsenic tellurides. Numerical solutions for secular equations of the quadrupole interaction energy are also discussed.
Murty, A. N.↗
The effect of high temperature upon the transmittance and the emission spectrum of infrared window materials
The effect of high temperatures such as those expected to be encountered in the Pioneer Venus Probe mission upon the transmittance of zinc selenide and cadmium telluride infrared window materials was investigated and the radiation emitted by these materials at high temperatures was determined.
Testerman, M. K.↗
Skylab experiments on semiconductors and alkali halides
The space processing experiments performed during the Skylab missions included one on single crystal growth of germanium selenide and telluride, one on pure and doped germanium crystals, two on pure and doped indium antimonide, one on gallium-indium-antimony systems, and one on a sodium chloride-sodium fluoride eutectic. In each experiment, three ampoules of sample were processed in the multipurpose electric furnace within the Skylab Materials Processing Facility. All were successful in varying degrees and gave important information about crystal growth removed from the effects of earth surface gravity.
Lundquist, C. A.↗