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Adiabatic frequency modulation of a superconducting resonator has been achieved by pulsed microwave interference. The technique has been shown to produce phase‐coherent variable‐frequency pulse‐power gain.
High‐speed high‐quantum‐efficiency avalanche photodiodes (APD’s) are required in the 1.0–1.4‐μm wavelength range in order to exploit the superior optical fibers now available at these wavelengths. The GaAlSb heterojunction APD’s reported here have external quantum efficiencies of...
25‐nm‐wide lines and spaces have been fabricated in 22.5‐nm‐thick films of PdAu (40 : 60) using electron‐beam exposure and polymethylmethacrylate (PMMA) resist. A high‐resolution scanning transmission electron microscopy (STEM) was used to expose the resist and the samples were...
Electron‐beam‐absorption measurements were performed to investigate the formation and annealing of radiation damage produced by ion implantation into GaP and GaAs 0.6 P 0.4 . The fluence F A required to yield an amorphous layer, the dependence of F A on ion mass and target temperature, and...
It is shown that heat treatment in a hydrogen plasma of pure amorphous silicon films prepared by UHV evaporation yields a material with no observable dangling bond ESR signal. This material has electrical properties similar to films prepared by a glow‐discharge decomposition of silane but a...
It was found that the liquidus composition determined by the saturation technique for the (100) ‐oriented InP source crystal is different from that for the (111) B ‐oriented InP source crystal in the LPE growth of GaInAsP alloys. The lattice‐matching conditions in GaInAsP LPE growth using...
The magnetoresistance of bulk and epitaxial films of doped n ‐type yttrium iron garnet is reported for the first time. In (111) films a Δ R / R of −0.55% is observed as a saturating applied field H is rotated out of the (111) plane to the film normal. There is no observable change in Δ R /...
The irradiation effect of 0.45‐MeV protons on the solubility and diffusivity of interstitial impurities has been studied by annealing nitrogen‐implanted molybdenum samples in the temperature region 600–800 °C. The nondestructive ( p ,γ) resonance‐broadening method was applied as a probe...
Anodically oxidized layers were grown on GaP (111) surfaces from a solution of N‐methyl acetamide, H 2 O, NH 4 OH, and citric acid having a p H value of 9.0. The layer growth rate was 11 Å/V with a constant current density of 0.5 mA/cm 2 . Auger electron spectra and depth profiles of the...
Saturation effects have been investigated in a KrF laser‐pumped backward Raman amplifier using methane gas. Pump depletion of 30% with an intensity gain of 2 has been demonstrated, and the results are shown to be consistent with a simple Frantz‐Nodvik saturation treatment.
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