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The EPR of a new impurity center in nitrogen‐implanted CdS has been observed. The observed fine and hyperfine structures show that this center is in the triplet state ( S =1) and consists of a couple of N nuclei, which is similar to a nitrogen molecule. On the basis of the experimental data,...
The operation of a thermal image converter for infrared and submillimeter wave laser radiation is reported. An energy density of 0.004 J∕cm 2 is sufficient for full contrast, independent of wavelength. Photographs taken with HCN laser radiation are shown.
Observation of self‐locking of longitudinal and transverse modes in a cw CO☒He☒O 2 laser is reported. Experimental results are given for different lengths of the optical cavity.
The resistivity of epitaxial silver films on mica in vacuum is studied as a function of temperature, thickness, and surface specularity on a sequence of samples having a common silver‐mica interface. Surface roughness is controlled by low‐temperature evaporation of very thin silver overlays....
The secondary electron yields of amorphous and the crystalline phases of thin films of Ge☒Te☒As are reported. For film which exhibited reversible bistable conductivity, a large change in yield between the amorphous and the crystalline phases was measured. For film which exhibited irreversible...
A new stroboscopic technique for investigating thermal switching has been used to yield a new model describing the time and spatial development of a thermal‐current constriction evolving out of a uniformly avalanching junction. The thermal instability was found to be caused by the buildup of...
The spontaneous parametric scattering from ruby‐laser‐pumped proustite crystals has been investigated. By rotating the crystal, the signal wavelength was tuned from 0.7293 to 1.0875 μ corresponding to an idler wavelength range of 14.6 to 1.93 μ. Frequency tuning by varying the crystal...
The electric field effect of epitaxial silver films on mica in vacuum is studied as a function of temperature, thickness, and surface specularity. Using size‐effect parameters derived from the analysis of film resistivity, the data indicate that the predominant mechanism for altering the...
Several watts of stable (Δ f∕f ≤3×10 −10 ) pure TEM 00 q ‐mode output power was obtained from completely sealed‐off CO lasers at operating temperatures between +35 and −90°C. No deterioration of output powers has been seen after hundreds of hours of sealed‐off operation.
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