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Phonon assisted tunnel ionization of deep impurities in the electric field of far-infrared radiation

URN to cite this document:
urn:nbn:de:bvb:355-epub-22609
Ganichev, Sergey ; Prettl, Wilhelm ; Huggard, P.G.
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Date of publication of this fulltext: 05 Aug 2009 13:38


Abstract

Ionization of semiconductor deep impurity centers has been observed in the far infrared, where photon energies are several factors of 10 smaller than the binding energy of the impurities. It is shown that the ionization is caused by phonon assisted tunneling in the electric field of the high power radiation. This optical method allows the investigation of the tunneling process at electric bias fields well below the threshold of avalanche breakdown.


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