Abstract:
A resonant tunneling periodic quantum well structure with asymmetric double quantum well period is proposed to achieve a population inversion and a frequency-tunable terahertz emission on intersubband transitions between Landau levels in a tilted magnetic field. The spatial redistribution of the subband wavefunctions caused by an asymmetric period design made it possible to achieve both a considerable increase in the population inversion and a high value of the dipole matrix element of the inter-Landau level radiative transition.
Citation:
M. P. Telenkov, Yu. A. Mityagin, A. A. Kutsevol, V. V. Agafonov, K. K. Nagaraja, “Intersubband population inversion in landau level system in resonant tunneling quantum well structures with asymmetric double quantum well period”, Pis'ma v Zh. Èksper. Teoret. Fiz., 100:10 (2014), 728–731; JETP Letters, 100:10 (2014), 644–647