Lasing in spin-polarized terahertz quantum cascade structures

Ivana Savić, Zoran Ikonić, Nenad Vukmirović, Vitomir Milanović, Dragan Indjin, Paul Harrison

Research output: Contribution to journalConference articlepeer-review


We investigate theoretically the possibility of lasing in the terahertz in a suitably designed quantum cascade structure comprising dilute magnetic semiconductors, quantum cascade laser. Tunability is based on the spin-dependent potential induced by a magnetic field. The Boltzmann equation approach was used in order to predict the dependence of the gain and current on magnetic and electric fields. The electron dynamics were modeled by taking electron-longitudinal optical phonon, electron-longitudinal acoustic phonon and electron-electron scattering into account. Tunability of the emission energy between 10 meV and 26 meV, and 38 meV and 42 meV, for transitions of spin-down and spin-up electrons respectively, may be achieved by varying a magnetic field up to 5 T, at a temperature of 1.5 K. Comparison of the calculated optical gain, and losses in the appropriate waveguide, indicates the prospect of achieving laser operation.

Original languageEnglish
Pages (from-to)4401-4404
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Issue number12
Publication statusPublished - 1 Jan 2007
Externally publishedYes
Event4th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors - Sendai, Japan
Duration: 15 Aug 200618 Aug 2006
Conference number: 4


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