This paper demonstrates a nanophotonic waveguide platform with embedded quantum dots (QDs) enabling Purcell-enhanced emission and strong chiral coupling. A glide-plane photonic crystal waveguide design with QD tuning matches emission frequency to the slow-light region. Simulations mapped chirality and Purcell enhancement. Record radiative decay rates were observed (17 ± 2 ns⁻¹ for non-chirally coupled dots, a 20 ± 2-fold enhancement; 5 ± 1-fold enhancement for chirally coupled dots). These results highlight the potential for using QDs in scalable on-chip spin-photonics.

Hamidreza Siampour, Christopher O'Rourke, Alistair J. Brash, Maxim N. Makhonin, René Dost, Dominic J. Hallett, Edmund Clarke, Pallavi K. Patil, Maurice S. Skolnick, A. Mark Fox