Physics

Observation of large spontaneous emission rate enhancement of quantum dots in a broken-symmetry slow-light waveguide

H. Siampour, C. O'rourke, et al.

This groundbreaking research by Hamidreza Siampour and colleagues showcases a nanophotonic waveguide platform with embedded quantum dots that enable significant Purcell-enhanced emission and remarkable chiral coupling. The study reveals record radiative decay rates and highlights the transformative potential of quantum dots in scalable on-chip spin-photonics. Join us to explore the future of photonics!

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Abstract

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.

Publisher

npj Quantum Information

Published On

Jan 15, 2023

Authors

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

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