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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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Detect Molecular Spectral Features of Newly Developed Vicia Faba Varieties and Protein Metabolic Characteristics in Ruminant System Using Advanced Synchrotron Radiation Based Infrared Microspectroscopy
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Microscopic two-color infrared imaging of Ni Al reactive particles and pellets
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Solvent-Induced Frequency Shifts of 5-Hydroxymethylfurfural Deduced via Infrared Spectroscopy and ab Initio Calculations
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Self-Assembled ErSb Nanostructures with Optical Applications in Infrared and Terahertz
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Photoresponse of an Electrically Tunable Ambipolar Graphene Infrared Thermocouple
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Sub-diffractional waveguiding by mid-infrared plasmonic resonators in semiconductor nanowires
Chains of nanoscale plasmonic resonators are capable of sub-diffractional waveguiding and have applications in nanophotonics and thermal radiation transport. Practical uses have largely been limited, however, due to high optical losses or low group velocities. In this work, we predict the waveguide performance of a material structure capable of overcoming these limitations: plasmonic resonators embedded in highdielectric nanowires. Due to the enhanced near-field coupling between resonators, we find that the group velocities and propagation lengths for doped Si plasmonic resonators in intrinsic Si nanowires can be increased by up to an order of magnitude compared to the case of isotropic vacuum surroundings. We investigate the impact of resonator aspect ratio, doping, and spacing on waveguide performance, and we find that propagation lengths are maximized for large aspect ratios and high dopant concentrations at small spacings. To study these complex anisotropic systems, we develop a new analytical “absorption spectra” method to extract waveguide information from simple far-field absorption experiments (or simulations) of only two coupled resonators.
Annulated bacteriochlorins for near-infrared photophysical studies
Bacteriochlorins with phenaleno or benzo annulation absorb at 913 or 1033 nm and exhibit excited-state lifetimes of 150 or 7 ps, suggesting applications in photoacoustic imaging.
Novel type-II material system for laser applications in the near-infrared regime
The design and experimental realization of a type-II “W”-multiple quantum well heterostructure for emission in the λ > 1.2 μm range is presented. The experimental photoluminescence spectra for different excitation intensities are analyzed using microscopic quantum theory. On the basis of the good theory–experiment agreement, the gain properties of the system are computed using the semiconductor Bloch equations. Gain values comparable to those of type-I systems are obtained.
Analytic properties of the quark propagator from an effective infrared interaction model
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