Towards superlattice terahertz amplifiers and lasers

Citations of this article
Mendeley users who have this article in their library.
Get full text


We describe our work towards THz sources which employ the "Bloch gain", a stimulated-emission mechanism which has been predicted as early as 1971 to exist for semiconductor superlattices but which researchers - in spite of much recent work - have not yet been able to take advantage of for the implementation of THz amplifiers and lasers. From a basic-physics point-of-view, the interest in Bloch gain arises from its dynamical, second-order character, involving simultaneous scattering of an electron and emission of a THz photon. This aspect has the practically important implication that the temperature dependence of the gain is determined to a large degree by the optical-phonon energy scale and not that of the photon energy, with the consequence that there is a rather slow roll-off the gain with temperature. This feature together with the rather high-gain values which are calculated to be comparable with those of THz quantum cascade lasers at low temperature, fosters the hope that a Bloch THz laser could be the first semiconductor-based THz laser operating at room temperature. © 2007 Springer.




Lisauskas, A., Mohler, E., Roskos, H. G., & Demarina, N. V. (2007). Towards superlattice terahertz amplifiers and lasers. In NATO Science for Peace and Security Series B: Physics and Biophysics (pp. 31–40). Springer Verlag.

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free