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It has been established that diffusion of photogenerated carriers into the electrode can be an important limitation of the collection efficiency of surface‐barrier‐limited photoconductors.
Holographic images covered with range contours were produced by the multifrequency emission of a pulsed ruby. The multifrequency emission arises from the use of a resonant output reflector in the laser cavity, producing contour intervals equal to the optical thickness of the resonator. Intervals...
The low‐field microwave emission from InSb subjected to parallel electric and magnetic fields is strongly dependent on the type of electrical contact attached to the sample. It is suggested that the radiation is a localized phenomenon due to high‐field regions or due to a Schottky barrier.
Experimental demonstration of the sum and difference frequency generation of surface acoustic waves on α‐quartz is reported. Individually calibrated interdigital transducers were used to generate and detect the waves. The absolute level of the nonlinearly generated acoustic power was measured...
Our measurements of the small signal conductance of a GaAs Gunn diode at low field values do not show the frequency dependence reported by K. Matsuno.
Optically excited recombination radiation is observed in n ‐type single crystals of the II–V compound Cd 3 P 2 . Line narrowing characteristic of stimulated emission is induced at high excitation intensities.
A theoretical application of the Weinreich relationship is presented which is valid for an acoustic signal of duration less than its transit time through the medium. The acoustoelectric field produced by a piezoelectrically active acoustic wave propagating through cadmium sulphide is calculated,...
Two nonlinear effects of laser propagation in dense plasmas have been analytically investigated, viz., laser penetration into an overdense plasma and the self‐focusing of a laser beam. It is concluded that for laser powers currently being used, both these effects can be quite important.
The physical characteristics of high resistivity CdTe which are relevant to its use for electro‐optic modulation have been investigated at 3.39 and 10.6 μ. The unclamped electro‐optic characteristic n 0 3 r 41 of CdTe was found to be 12 × 10 −11 m∕V and the absorption coefficient is...
Simultaneous mode‐locking and quasi cw second‐harmonic generation (SHG) in high‐temperature lithium niobate or barium sodium niobate of a Nd 3+ :YAG laser have been accomplished by electro‐optic modulation of the nonlinear medium. This technique will be useful for obtaining ``100%...
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