Rotation of exciton-polariton condensates with TE-TM splitting in a microcavity ring

Abstract

We investigate exciton-polariton condensates with a rotating potential induced by an electric field in a semiconductor microcavity ring. In the absence of transverse-electric-transverse-magnetic (TE-TM) splitting, we find that there is a critical laser pump rate, above which the quantized phase slips appear with hysteresis, and there exist quantized average angular momenta at fixed angular velocities, regardless of the pump rate. When considering the TE-TM splitting, we find that there are a series of hysteresis loops with the same intervals which are modulated by the magnitude of the splitting for a linear polarization laser. Further, multistability occurs at large pump rate, and there arises a phase slip for only one spin with large absolute value of the polarization degree, owing to the competition of the TE-TM splitting and energy induced by rotation. These results can be verified experimentally with current technology, and are useful for future electro-optic devices.

Dynamics of spin polarization in tilted polariton rings

“…Ring shaped polariton waveguides is attracting a great deal of attention for exploring various topological effects [22][23][24][25] due to the TE-TM splitting in these structures. We present in this direction the first experiments on etched polariton rings.…”

Nonreciprocal Transport of Exciton Polaritons in a Non-Hermitian Chain

“…The nonlinear coefficients used for the calculations are α 1 ¼ 1 μeV μm 2 [65], α 2 ¼ −0.05α 1 [66][67][68], and α NL ¼ 0.3α 1 [69]. Although we have modeled the scheme with resonant excitation, we expect that the nonreciprocal transport mechanism would also be compatible with bistability under nonresonant excitation [70][71][72].…”

Split-ring polariton condensates as macroscopic two-level quantum systems

“…Let us consider a close circuit filled with a coherent quantum fluid. The phase of the many-body wave function ψ(t, s) of the fluid ϕ must obey the equality: D ∂ s ϕds = 2π , which is the quantisation condition for the topological invariant ∈ Z also known as the winding number 21,22 . Here s is the coordinate along the circuit of a total length D. If the circuit is subjected to some effective vector potential A, the quantisation condition becomes D ∂ s ϕds − θ = 2π .…”