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Experimental results of hysteresis effects observed on platinum‐diffused 〈111〉 metal‐oxide‐silicon structures are presented. The experimental observations point to this phenomenon being associated with some bias‐dependent charge storage at the oxide‐silicon interface or mobile...
We report the application of four‐wave mixing to real‐time image processing. We constructed a nonlinear optical processor using a photorefractive medium Bi 12 SiO 20 and demonstrated that it is capable of convolving and correlating objects with spatial information.
Measurements of internal photoemission from metal contacts into amorphous SiH x are reported. The height of the barriers at Cr, Pd, and Pt contacts were found to be 0.83, 0.98, and 1.12 eV, respectively, from the photoemission threshold.
Laser pulses have been used to study the growth and removal of dislocations underneath thin oxide layers in silicon. These observations provide clear evidence of melting under the oxide layer without disturbing the oxide layer on the surface. The thickness of melted regions increased with...
We report stable temporal compression of mode‐locked laser pulses using a saturable dye in a regenerative amplifier. We have demonstrated compression at 1.06 μm from 120 to 15 ps with energy stability better than ±5%, and we have demonstrated synchronization of the compressed pulse to pulses...
Spontaneous emission from GaAs lasers is substantially reduced by fabricating a high‐reflection dielectric stack coating for the rear facet and apertured coatings of highly absorbing Te for the front (output) facet. After deposition the Te is ablated by the laser mode itself and the aperture is...
Silicon samples implanted with both Ar and As at fluences of 1×10 16 /cm 2 were irradiated with Q ‐switched Nd:YAG double‐frequency laser pulses. Reordering of the damaged layers occurs for 30‐ and 130‐keV Ar implants at about 0.6 and 1.3 J/cm 2 , respectively. An Ar concentration of the...
During deposition of p ‐ and n ‐GaAs multilayers by a novel liquid phase epitaxy (LPE) technique on slightly misoriented substrates, a gradual transition from macroscopically steped surfaces to faceting has been observed. The change from various different growth mechanisms on corrugated...
The results of the present investigation on cleaved and undamaged 〈111〉 crystals of β‐BaF 2 show no signs of transformation of β‐ to α‐BaF 2 under shock compression, consistent with the idea that the transformation does not occur in the undamaged layer of β‐BaF 2 . Further, the...
A simple and sensitive pulse acousto‐optic modulator using a nematic liquid crystal in its isotropic phase is presented. The effects of acoustic intensity and of temperature are considered. It is shown that modulation can be obtained at very low values of the applied voltage.
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