Enabling single-mode behavior over large areas with photonic Dirac cones
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Joannopoulos-2012-Enabling single-mode behavior over large areas.pdf
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Author(s)
Bravo-Abad, Jorge
Joannopoulos, John D.
Soljacic, Marin
Date Issued
June 2012
Journal
Proceedings of the National Academy of Sciences of the United States of America
Publisher
National Academy of Sciences (U.S.)
Citation
Bravo-Abad, J., J. D. Joannopoulos, and M. Soljacic. “Enabling Single-mode Behavior over Large Areas with Photonic Dirac Cones.” Proceedings of the National Academy of Sciences 109.25 (2012): 9761–9765. Web.
Version
Final published version
Abstract
Many of graphene’s unique electronic properties emerge from its Dirac-like electronic energy spectrum. Similarly, it is expected that a nanophotonic system featuring Dirac dispersion (two conical bands touching at a single point, the so-called Dirac point) will open a path to a number of important research avenues. To date, however, all proposed realizations of a photonic analog of graphene lack fully omnidirectional out-of-plane light confinement, which has prevented creating truly realistic implementations of this class of systems able to mimic the two-dimensional transport properties of graphene. Here we report on a novel route to achieve all-dielectric three-dimensional photonic materials featuring Dirac-like dispersion in a quasi-two-dimensional system. We further discuss how this finding could enable a dramatic enhancement of the spontaneous emission coupling efficiency (the β-factor) over large areas, defying the common wisdom that the β-factor degrades rapidly as the size of the system increases. These results might enable general new classes of large-area ultralow-threshold lasers, single-photon sources, quantum information processing devices and energy harvesting systems.
Description
This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1207335109/-/DCSupplemental
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1073/pnas.1207335109
