Dielectric GaAs Antenna Ensuring an Efficient Broadband Coupling between an InAs Quantum Dot and a Gaussian Optical Beam

Mathieu Munsch, Nitin S. Malik, Emmanuel Dupuy, Adrien Delga, Joel Bleuse, Jean-Michel Gerard, Julien Claudon, Niels Gregersen, Jesper Mørk

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    Abstract

    We introduce the photonic trumpet, a dielectric structure which ensures a nearly perfect coupling between an embedded quantum light source and a Gaussian free-space beam. A photonic trumpet exploits both the broadband spontaneous emission control provided by a single-mode photonic wire and the expansion of this mode within a conical taper. Numerical simulations highlight the performance and robustness of this concept. As a first application in the field of quantum optics, we report the realization of an ultrabright single-photon source. The device, a high aspect ratio GaAs photonic trumpet containing a few InAs quantum dots, demonstrates a first-lens external efficiency of 0.75±0.1 and an external coupling efficiency to a Gaussian beam as high as 0.58±0.08.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume110
    Issue number17
    Pages (from-to)177402
    Number of pages5
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2013

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