Iv. Altukhov et al., Continuous stimulated terahertz emission due to intra-center population inversion in uniaxially strained germanium, PHYSICA B, 272(1-4), 1999, pp. 458-460
We present study of stimulated THz emission from uniaxially strained Ge at
low electric field. The cw regime was reached at electric field below 10 V/
cm. The carrier population inversion is a result of capture and emission of
free holes at strain-induced resonant acceptor states. (C) 1999 Elsevier S
cience B.V. All rights reserved.