| SM ISO690:2012|
MOSKALENKO, Sveatoslav; PODLESNY, Igor; DUMANOV, Evgheni; LIBERMAN, Michael; RUSU, Spiridon; BAJIREANU, Valentina. Two-dimensional cavity polaritons under the influence of a strong perpendicular magnetic field. In: Materials Science and Condensed Matter Physics. Editia a 7-a, 16-19 septembrie 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2014, p. 32.
|Materials Science and Condensed Matter Physics
Editia a 7-a, 2014
Conferința "Materials Science and Condensed Matter Physics" |
Chișinău, Moldova, 16-19 septembrie 2014
The properties of the two-dimensional (2D) cavity polaritons subjected to the action of a strong perpendicular magnetic and electric fields, giving rise to the Landau quantization (LQ) of the 2D electrons and holes accompanied by the Rashba spin-orbit coupling (RSOC) and by the Zeeman splitting (ZS) were investigated. The strong magnetic field, when the electron and the hole cyclotron frequencies are greater than the binding energy of the 2D Wannier-Mott excitons completely reconstructs it, transforming into the magnetoexcitn, the structure of which is determined by the Lorintz force rather than by the Coulomb electron-hole (e-h) interaction. We predict the drastically changements of the optical properties of the cavity polaritons including those in the state of Bose-Einstein condensation. The main of them is the existence of a multitude of the polariton energy levels nearly situated on the energy scale, their origin being related with the LQ of the electrons and holes. Most of these levels have the nonmonotonous dependences on the magnetic field strength B with overlapping and intersections. More so, the selection rules of the band-to-band optical quantum transitions as well as of the quantum transitions from the ground state of the crystal to the magnetoexciton states depend essentially on the numbers ne and nh of the LQ levels of the e-h- pair forming the magnetoexciton. Changing slowly the external magnetic and electric fields it is possibly to change the lowest polariton energy level, its oscillator strength, the probability of the quantum transition and the Rabi frequency of the polariton dispersion law. They depend on the relation between the numbers ne and nh and can lead to dipole-active, quadrupoleactive or forbidden optical transitions. Our results are based on the exact solutions for the eigenfunctions and for the eigenvalues of the Pauli-type Hamilonian with third order chirality terms and nonparabolic dispersion law for heavy-holes and with first order chirality terms for electrons. They were obtained using the method proposed by Rashba. We expect that these results will determine also the collective behavior of the cavity polaritons, for example, in the GaAs-type quantum wells embedded into the microcavity, which recently revealed the phenomenon of the Bose-Einstein condensation in the state of the thermodynamic quasiequilibrium but in the absence of a strong perpendicular magnetic field.