Photonic “hourglass” design for efficient quantum light emission

We propose a novel "hourglass"-shaped design for highly efficient generation and collection of quantum light. The design features a quantum dot in a photonic nanowire sandwiched between tapered Bragg reflectors. For a Purcell factor of 9, the design features a spontaneous emission coupling...

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Published in:Optics letters 2019-06, Vol.44 (11), p.2617
Main Authors: Osterkryger, Andreas Dyhl, Claudon, Julien, Gérard, Jean-Michel, Gregersen, Niels
Format: Article
Language:English
Subjects:
Bragg reflectors
Collection
Dielectric strength
Light emission
Nanowires
Photonics
Physics
Quantum dots
Spontaneous emission
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creator Osterkryger, Andreas Dyhl
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description We propose a novel "hourglass"-shaped design for highly efficient generation and collection of quantum light. The design features a quantum dot in a photonic nanowire sandwiched between tapered Bragg reflectors. For a Purcell factor of 9, the design features a spontaneous emission coupling of 0.993 to the cavity mode enabled by the strong dielectric screening of radiation modes. Thanks to a highly reflecting bottom mirror, we furthermore demonstrate a collection efficiency of 0.95 to a Gaussian profile. Finally, this photonic structure features a broad operation bandwidth, as large as 11 nm.
doi_str_mv 10.1364/OL.44.002617
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source Optica Publishing Group Journals
subjects Bragg reflectors
Collection
Dielectric strength
Light emission
Nanowires
Photonics
Physics
Quantum dots
Spontaneous emission
title Photonic “hourglass” design for efficient quantum light emission
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