Spin-orbit interaction induced singlet-triplet resonant Raman transitions in quantum dot helium

Abstract

From our theoretical studies of resonant Raman transitions in two-electron\nquantum dots (artificial helium atoms) we show that in this system, the\nsinglet-triplet Raman transitions are allowed (in polarized configuration) only\nin the presence of spin-orbit interactions. With an increase of the applied\nmagnetic field this transition dominates over the singlet-singlet and\ntriplet-triplet transitions. This intriguing effect can therefore be utilized\nto tune Raman transitions as well as the spin-orbit coupling in few-electron\nquantum dots.\n