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The variation of the flux structure with thickness in thin‐film type I superconductors in perpendicular fields has been directly observed. As the film thickness decreases, the flux distribution varies from the intermediate state structure to a mixed state structure of multiply quantized flux...
A photosensitive material based on photo‐induced polymerization has been used to record holograms. Exposure of 1 to 30 mJ∕cm 2 at 0.694 μ were followed by rapid optical, dry processing with ultraviolet radiation. Good resolution and diffraction efficiencies of up to 45% into the first order...
Observation of the propagation of 285‐MHz Love waves is reported. The transducers and propagating structure are described.
Measurements of microwave transmission through inhomogeneous solid‐state magnetoplasmas formed by InSb, InAs, HgTe, and HgSe powders are discussed and their main features quantitatively explained in terms of a scattering model. The theory asserts that propagation is dominated by magnetic dipole...
Measurements of electron cyclotron resonance in n ‐type InSb at 4.2°K have been conducted using far‐infrared laser emission lines at 337 and 311 μm from HCN and 119 μm from H 2 O. Well‐resolved resonance lines were observed for each wavelength with the apparent effective mass dependent...
The extent that characteristics of intense, ultrashort duration pulses can be determined using the two‐photon fluorescence (TPF) display technique is examined within the framework of a simple model of partial laser mode‐locking. It is found that the contrast ratio in the TPF pattern can give...
A method is shown of recording a hologram without spatially offsetting the reference beam. The temporal frequency of the reference beam is offset and the the resultant intensity pattern is scanned using a television camera. The desired conjugate image signals are separated from the undesired...
A mechanism is proposed to explain anomalous interaction effects between laser lines in Ar + and Kr + . Radiative transitions connecting the upper level of the directly modulated laser line and the lower level of the cross‐modulated line are responsible for the anomalous behavior. This...
An investigation of the sparks produced by picosecond pulses from mode‐locked Nd:glass and ruby lasers indicates the existence of breakdown regions of diameter less than 5 μ. These results support the hypothesis that self‐focusing of the beam may be involved in the breakdown process.
A criterion for mode‐locking of laser signals is presented that involves the signal spectrum and the intensity spectrum.
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