Far infrared stimulated and spontaneous radiation in uniaxially deformed zero-gap Hg1-xCdxTe

Stimulated radiation in the range of 80-100 mu m was observed in uniaxially stressed zero-gap Hg1 - xCdxTe (x = 0.10-0.14) under conditions of impact ionization by an electric field. The abrupt increase in emission occurs und er the threshold values of elastic strain and electric-field strength and i s followed by an abrupt increase in the current in the sample. The field an d deformation dependences of spontaneous radiation are also determined. The mechanism of the effect observed is suggested taking into account the tran sformation of energy bands and impurity acceptor levels by the uniaxial ela stic stress. (C) 2000 MAIK "Nauka / Interperiodica".