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A nanophotonic laser on a graph

Author

Listed:
  • Michele Gaio

    (Imperial College London)

  • Dhruv Saxena

    (Imperial College London)

  • Jacopo Bertolotti

    (University of Exeter)

  • Dario Pisignano

    (NEST, Istituto Nanoscienze-CNR
    Universitá del Salento, via Arnesano
    Universitá di Pisa)

  • Andrea Camposeo

    (NEST, Istituto Nanoscienze-CNR)

  • Riccardo Sapienza

    (Imperial College London)

Abstract

Conventional nanophotonic schemes minimise multiple scattering to realise a miniaturised version of beam-splitters, interferometers and optical cavities for light propagation and lasing. Here instead, we introduce a nanophotonic network built from multiple paths and interference, to control and enhance light-matter interaction via light localisation. The network is built from a mesh of subwavelength waveguides, and can sustain localised modes and mirror-less light trapping stemming from interference over hundreds of nodes. With optical gain, these modes can easily lase, reaching ~100 pm linewidths. We introduce a graph solution to the Maxwell’s equation which describes light on the network, and predicts lasing action. In this framework, the network optical modes can be designed via the network connectivity and topology, and lasing can be tailored and enhanced by the network shape. Nanophotonic networks pave the way for new laser device architectures, which can be used for sensitive biosensing and on-chip optical information processing.

Suggested Citation

  • Michele Gaio & Dhruv Saxena & Jacopo Bertolotti & Dario Pisignano & Andrea Camposeo & Riccardo Sapienza, 2019. "A nanophotonic laser on a graph," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-018-08132-7
    DOI: 10.1038/s41467-018-08132-7
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    Cited by:

    1. Dhruv Saxena & Alexis Arnaudon & Oscar Cipolato & Michele Gaio & Alain Quentel & Sophia Yaliraki & Dario Pisignano & Andrea Camposeo & Mauricio Barahona & Riccardo Sapienza, 2022. "Sensitivity and spectral control of network lasers," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Kravitz, H. & Brio, M. & Caputo, J.-G., 2023. "Localized eigenvectors on metric graphs," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 214(C), pages 352-372.

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