%0 Journal Article
%A Bennett, Anthony J.
%A Lee, James P.
%A Ellis, David J. P.
%A Meany, Thomas
%A Murray, Eoin
%A Floether, Frederik F.
%A Griffths, Jonathan P.
%A Farrer, Ian
%A Ritchie, David A.
%A Shields, Andrew J.
%T Cavity-enhanced coherent light scattering from a quantum dot
%D 2016
%R 10.1126/sciadv.1501256
%J Science Advances
%P e1501256
%V 2
%N 4
%X The generation of coherent and indistinguishable single photons is a critical step for photonic quantum technologies in information processing and metrology. A promising system is the resonant optical excitation of solid-state emitters embedded in wavelength-scale three-dimensional cavities. However, the challenge here is to reject the unwanted excitation to a level below the quantum signal. We demonstrate this using coherent photon scattering from a quantum dot in a micropillar. The cavity is shown to enhance the fraction of light that is resonantly scattered toward unity, generating antibunched indistinguishable photons that are 16 times narrower than the time-bandwidth limit, even when the transition is near saturation. Finally, deterministic excitation is used to create two-photon N00N states with which we make superresolving phase measurements in a photonic circuit.
%U https://advances.sciencemag.org/content/advances/2/4/e1501256.full.pdf