Voltage control of the spin-dependent interaction constants of Dipolaritons and its application to Optical Parametric Oscillator

Abstract

Dipolariton is a voltage controlled mixture of direct and indirect excitons in asymmetric double quantum wells coupled by resonant carrier tunneling, and a microcavity photon. We calculate the voltage dependence of the spin-singlet and spin-triplet interaction parameters ${\alpha }_1$ and ${\alpha }_2$. Both parameters can reach values one order of magnitude larger than that of exciton-polaritons thanks to the strong interaction between indirect excitons. We show that the variation of the indirect exciton fraction of the dipolaritons induces a changes of sign of ${\alpha }_2$ increasing voltage: the interaction passes from attractive to repulsive. For large enough voltage ${\alpha }_2$ becomes larger than ${\alpha }_1$ which in principle can lead to the formation of a circularly polarised dipolariton condensate. We propose an application of the ${\alpha }_2$ dependence to a voltage-controlled dipolaritonic optical parametric oscillator. The change of sign of ${\alpha }_2$ allows an on-site control of the linear polarization degree of the optical signal and its on-demand inversion.

References in corpus (6)

• Quantum fluids of light
• Polariton Condensate Transistor Switch
• Polarization multistability of cavity polaritons
• Half-vortices in polariton condensates
• Polaritonic Feshbach Resonance
• Spin-orbit coupled cold exciton condensates

Cited by in corpus (3)

• Optical activity of quantum wells
• Dipolar polaritons in microcavity-embedded coupled quantum wells in electric and magnetic fields
• Light-enhanced dipolar interactions between exciton polaritons