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The interaction between waves in an idealized saturable absorber is discussed. It is shown that the presence of a strong wave will cause the line to appear to be ``hole‐burned'' when probed by a second wave, even though the broadening mechanisms are conventionally homogeneous. This effect would...
Measurements have been made of the shift in center frequency of the (2 p 4 — 3 s 2 ) 6328‐Å 20 Ne transition in a Zee‐man discharge cell as a function of discharge current and gas filling. Such measurements are important for comparing the reproducibility and long‐term stability of laser...
Optical and electrical measurements on thin sections of Bi 4 Ti 3 O 12 in orientations not previously measured have yielded the following results. The symmetry is monoclinic, point group m. The spontaneous polarization P s is greater than 30 μC∕cm 2 and lies in a direction tilted slightly from...
Measurements of low‐impedance thin‐film tunneling junctions at room temperature frequently yield inaccurate values for the tunneling resistance. In some cases the indicated resistance is negative. A theory is developed which shows that the finite resistance of the metal films can account for...
The energy spectrum of the D ( d, p ) T protons shows that with gold foils a surface and an inner part of imbedded deuterons exist, whereas solid gold gives only an inner part, solid copper and nickel only surface parts.
Thin‐film zinc‐oxide microwave acoustic transducers have been formed successfully by vacuum deposition techniques upon a cooled substrate (−50°C) by evaporation of zinc with an oxygen beam. The films are hexagonal preferentially oriented with c axis normal to the substrate. A device...
Complex changes in the distribution of thermally stimulated current peaks with illumination time and intensity are reported for a sample of semi‐insulating GaAs. With weak illumination for 5 sec, at least six peaks were seen, while after a 1‐min illumination only four peaks were evident. With...
The light intensity of a positive column in a longitudinal magnetic field changes with the field and becomes minimum at the critical field when a helical oscillation appears in the positive column. As this change is very steep at the critical point, even when the longitudinal electric field does...
Experiments are described in which nitrogen and neon lasers are excited by a wave of current excitation which effectively travels from one end of the laser to the other with its velocity matching that of the stimulated emission. This type of excitation is accomplished with a low‐impedance...
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