Speaker
Oleksandr Kyriienko
Description
We investigate the intersubband polaritons formed in the
asymmetric quantum well (AQW) embedded into the
semiconductor microcavity and study the effects of
spin-orbit interaction. The Rashba and Dresselhaus
spin-orbit interaction remove the spin degeneracy of
electrons and allow the four types of intersubband
excitations. While optical spin-flip transitions are
suppressed, the spectrum of elementary excitations showed
the appearance of upper, lower and middle polaritonic
branches based on spin-conserving transitions. We analyze
the influence of spin-orbit interaction (SOI) and show that
accounting of non-zero photon momentum leads to the non-zero
spin polarization in the system. We predict the possibility
of creation of pure spin currents in the considered systems
with long coherence length by using the external laser source.
