Microwave Radiation from Very Short Samples of Indium Antimonide.
Interim technical rept.,
CORNELL UNIV ITHACA NY SCHOOL OF ELECTRICAL ENGINEERING
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The pulsed d-c and microwave properties of very short samples of n-type indium antimonide InSb were studied. Efforts to fabricate non-injecting ohmic contacts were unsuccessful, and the sample current rose sharply at an average electric field substantially lower than that reported in the literature. The samples were tested in a double-slug coaxial resonator, and broadband, noisy signals were emitted when mutually perpendicular electric and magnetic fields were applied. The threshold conditions for these oscillations were about 250 voltscm and 1.5 kilogauss. Coherent oscillations were seen to be present between 0.5 and 1 GHz at the beginning of each pulse. The frequency of these oscillations was not a clear function of the bias conditions or sample length although a higher magnetic field seemed to result in a higher frequency. Using a slotted line technique, the r-f impedance of the samples was measured. Author
- Solid State Physics