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VOLUME 39 (1984) | ISSUE 12 |
PAGE 540
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Threshold generation of harmonics in the microwave range in bismuth
Vitkalov S. A. , Gantmakher V. F. , Leviev G. I.
When bismuth is irradiated with an intense electromagnetic wave, it is usually possible to observe the stationary generation of the second harmonic whose power increases quadratically with the pump power. Against the background of this typical generation and in the presence of a magnetic field, we have observed threshold generation, which is sometimes two orders of magnitude more powerful. This generation, whose pulses are several times shorter than the pumping pulses, is delayed relative to the beginning of irradiation by several microseconds.
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