Sensitivity of low-dimensional crystals to submillimeter radiation

Alexander I. Dmitriev; George V. Lashkarev

doi:10.1117/12.224241

13 October 1995 Sensitivity of low-dimensional crystals to submillimeter radiation

Alexander I. Dmitriev, George V. Lashkarev

Proceedings Volume 2558, Millimeter and Submillimeter Waves II; (1995) https://doi.org/10.1117/12.224241
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

The strong photoeffect was discovered experimentally in specially doped InSe crystals at temperatrue 4.2 K as a result of laser radiation action at fixed wavelengths of 337 and 195 microns. Also some of the kinetic, galvanomagnetic and optical anomalies had been observed. They are explained by appearance of the gap E in the conduction band continuum of degenerated 2D semiconductor charge density waves state. The long wave threshold of photocurrent was found to depend strongly on a magnitude of electric current (J) through the crystal. A rough estimation gives a value dE/dJ approximately 0.4 meV/mA. We had carried out experiments in order to study instabilities of InSe electrical properties in temperature range 4.2-300 K by quasi stationary conditions. Abrupt electrical resistivity increases about 5 times were observed by us at temperatures 5, 10, 14, 27, 31, 170, and 200 K.

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Alexander I. Dmitriev and George V. Lashkarev "Sensitivity of low-dimensional crystals to submillimeter radiation", Proc. SPIE 2558, Millimeter and Submillimeter Waves II, (13 October 1995); https://doi.org/10.1117/12.224241

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