Controlling cooperative emission and superradiance in waveguide-coupled quantum dots

We report the measurement of collective emission from a pair of independently tuneable InAs quantum dots embedded in a nanophotonic waveguide. A split diode structure allows independent electrical control of the quantum dot transition energies over a wide range with minimal loss in waveguide couplin...

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Bibliographic Details
Published inarXiv.org
Main Authors Hallett, D, Wiercinski, J, Hallacy, L, Sheldon, S, Dost, R, Martin, N, Fenzl, A, Farrer, I, Verma, A, Cygorek, M, Gauger, E M, Skolnick, M S, Wilson, L R
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 23.10.2024
Subjects
Cooperative control
Emitters
Quantum dots
Service life assessment
Spontaneous emission
Waveguides
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Summary:We report the measurement of collective emission from a pair of independently tuneable InAs quantum dots embedded in a nanophotonic waveguide. A split diode structure allows independent electrical control of the quantum dot transition energies over a wide range with minimal loss in waveguide coupling efficiency. We utilise this to systematically map out the transition from collective to independent emission. We perform both lifetime as well as Hanbury Brown-Twiss measurements on the device, observing anti-dips in the photon coincidences indicating collective emission while at the same time observing a drop in lifetime around zero detuning, indicating superradiant behaviour. Performing both measurement types allows us to investigate detuning regions which show both superradiant rate enhancement and inter-emitter coherence, as well as regions in which correlations persist in the absence of rate enhancement.
ISSN:2331-8422