From the topological spin-Hall effect to the non-Hermitian skin effect in an elliptical micropillar chain

Optically induced topological spin-valley Hall effect for exciton polaritons

“…Apart from the linear effects, the nonlinearity of polaritons alone can induce topological phases, such as the appearance of the Haldane model [58,59] and antichiral edge states [60]. The non-Hermiticity of the polaritons was used to realize topological phases in 1D micropillar chains [61][62][63]. Even after such advancement of topological polaritonics, the analogue of the topological spin Hall effect [64], where different spins propagate in opposite directions, has not been demonstrated yet.…”