Chiral light–matter interaction between photonic nanostructures with quantum emitters
shows great potential to implement spin–photon interfaces for quantum information
processing. Position-dependent spin momentum locking of the quantum emitter is important
for these chiral coupled nanostructures. Here, we report the position-dependent chiral
coupling between quantum dots (QDs) and cross waveguides both numerically and
experimentally. Four quantum dots distributed at different positions in the cross section are …