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15 Feb 1969

Volume 14, Issue 4, pp. 119-143


EFFECT OF THE NON‐EQUILIBRIUM CARRIERS ON THE TEMPERATURE HYSTERESIS OF THE PHASE TRANSITION IN SbSI

A. A. Grekov, A. I. Rodin, and V. M. Fridkin

Appl. Phys. Lett. 14, 119 (1969); http://dx.doi.org/10.1063/1.1652739 (2 pages) | Cited 1 time

Online Publication Date: 17 October 2003

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The illumination of the SbSI crystal in the range of its intrinsic photosensitivity results in the change of the temperature hysteresis value of the phase transition. This effect may be accounted for by the dependence of the surface energy of the nucleus of the new phase on the carrier density in the crystal.

MOTION PICTURE HOLOGRAPHY

A. D. Jacobson, V. Evtuhov, and J. K. Neeland

Appl. Phys. Lett. 14, 120 (1969); http://dx.doi.org/10.1063/1.1652740 (3 pages) | Cited 6 times

Online Publication Date: 17 October 2003

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An experiment to record a holographic motion picture is described. The source of illumination is a cw ruby laser operated in the repetitively Q‐switched mode. The film was recorded at the rate of 20 frames per second on 100 ft of 70‐mm film, transported by a conventional 70‐mm sequential‐still camera. The subject of the movie was a group of tropical fish.

ACOUSTIC SURFACE WAVE COUPLING ACROSS AN AIR GAP

W. L. Bond, J. H. Collins, H. M. Gerard, T. M. Reeder, and H. J. Shaw

Appl. Phys. Lett. 14, 122 (1969); http://dx.doi.org/10.1063/1.1652741 (3 pages) | Cited 7 times

Online Publication Date: 17 October 2003

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Transfer of acoustic surface waves between two noncontacting surfaces by means of passive, co‐directional piezoelectric coupling is achieved in LiNbO3. Minimum coupling loss is less than 3 dB. When the surfaces are maintained parallel, periodic variation of insertion loss with coupling length is observed. Measurements are in close agreement with predictions using coupled mode theory. A 100‐MHz delay line with a mechanically variable, nondispersive differential delay of 6.1 μsec and a total insertion loss less than 17 dB which utilizes this coupling mechanism is reported.

MODE INTERACTIONS BETWEEN THE 4881‐ AND 5147‐ Å LINES IN Ar+ LASERS

H. Statz, G. A. deMars, and C. L. Tang

Appl. Phys. Lett. 14, 125 (1969); http://dx.doi.org/10.1063/1.1652742 (3 pages) | Cited 5 times

Online Publication Date: 17 October 2003

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It is shown that oscillation in Ar+ on the 4881‐Å line produces polarization source terms in the region of the 5147‐Å oscillation. These source terms may profoundly influence the mode spectra and the power output of that line. Certain earlier experimental results may be understood in terms of these concepts. We also give further support to the presented mechanism through new experiments.

PLASMA ANODIZATION OF GERMANIUM

John F. O'Hanlon

Appl. Phys. Lett. 14, 127 (1969); http://dx.doi.org/10.1063/1.1652743 (3 pages) | Cited 6 times

Online Publication Date: 17 October 2003

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A model is presented for the measurement of the voltage drop across a plasma anodized germanium film. This model proposes that the potential at the plasma—oxide interface is controlled by the plasma. From this model the anodization constant of germanium has been determed to be 31 Å∕V.

SULFUR DIOXIDE SUBMILLIMETER LASER

Thomas M. Hard

Appl. Phys. Lett. 14, 130 (1969); http://dx.doi.org/10.1063/1.1652744 (1 page) | Cited 4 times

Online Publication Date: 17 October 2003

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A mixture of 0.4‐Torr SO2 with 0.4‐Torr He lases at 70.98, 66.14, 51.89, and 46.44 cm−1 when excited by a pulsed discharge. The previous report of cw oscillation on the first and the third of these lines is confirmed.

IMPURITY EFFECTS ON ANNEALING OF RADIATION DEFECTS IN SILICON

P. H. Fang and P. Iles

Appl. Phys. Lett. 14, 131 (1969); http://dx.doi.org/10.1063/1.1652745 (2 pages) | Cited 4 times

Online Publication Date: 17 October 2003

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A shift of about 100°C is observed in the isochronal annealing temperature of the dominant annealing stage in p‐on‐n silicon solar cells with a heavy donor concentration of 1017 cm−3 in the n region and low oxygen concentration in the crystal.

CURIE‐POINT WRITING OF MAGNETIC HOLOGRAMS ON MnBi

R. S. Mezrich

Appl. Phys. Lett. 14, 132 (1969); http://dx.doi.org/10.1063/1.1652746 (3 pages) | Cited 25 times

Online Publication Date: 17 October 2003

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Reversible phase holograms have been made on thin films of MnBi by Curie‐point writing. Magnetic holograms are formed when the interference pattern, created by conventional holographic techniques, heats the film above its Curie temperature, causing a magnetic domain pattern that corresponds to the interference pattern. The magnetic hologram can be nondestructively read out, without the use of polarizers or analyzers, by means of either the Faraday or Kerr magneto‐optic effect. The hologram can be erased by application of a magnetic field.

FAR‐INFRARED LASING IN H2S, OCS, AND SO2

J. C. Hassler and P. D. Coleman

Appl. Phys. Lett. 14, 135 (1969); http://dx.doi.org/10.1063/1.1652747 (2 pages) | Cited 6 times

Online Publication Date: 17 October 2003

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Twenty‐four lasing lines have been found in an H2S laser in the range 33 to 225 μ, three lines in SO2 at 141, 151, and 215 μ, and two lines in OCS at 123 and 132 μ. Comparing H2S to H2O, the pulse power outputs are about equal and the lines about as numerous. However, while the H2O lines essentially lase during the exciting 5‐μsec current pulse, the H2S lines turn on about 20–30 μsec after the 5‐μsec current pulse and last for 20 to 100 μsec.

TRANSIENT AND STEADY STATE THERMAL SELF‐FOCUSING

R. L. Carman, A. Mooradian, P. L. Kelley, and A. Tufts

Appl. Phys. Lett. 14, 136 (1969); http://dx.doi.org/10.1063/1.1652748 (4 pages) | Cited 15 times

Online Publication Date: 17 October 2003

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Self‐focusing of a cw argon laser beam due to absorptive heating in glass is reported here, with particular emphasis on the time dependence.

SUBPICOSECOND PULSE GENERATION USING THE OPTICAL KERR EFFECT

Robert A. Fisher, P. L. Kelley, and T. K. Gustafson

Appl. Phys. Lett. 14, 140 (1969); http://dx.doi.org/10.1063/1.1652749 (4 pages) | Cited 59 times

Online Publication Date: 17 October 2003

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See Also: Erratum

Show Abstract
A frequency modulation which is monotonic in time over a portion of an optical pulse can be utilized together with a dispersive delay line to obtain temporal compression of the pulse envelope. Short pulses (picosecond range) passed through an optical Kerr liquid receive a self‐phase‐modulation which exhibits a frequency sweep in the region of maximum intensity, the slope in time being proportional to the propagation distance. Frequency spreads of the order of 103 cm−1 are obtainable and hence significant compression ratios should be possible, giving rise to very short pulses in the range of 10−14 to 10−13 sec.
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