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Broadband chirality-coded meta-aperture for photon-spin resolving

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  • Luping Du

    (Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University
    School of Electrical and Electronic Engineering, Nanyang Technological University
    School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia)

  • Shan Shan Kou

    (School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia
    La Trobe Institute for Molecular Science (LIMS), La Trobe University
    Australian Research Council Centre of Excellence for Advanced Molecular Imaging)

  • Eugeniu Balaur

    (La Trobe Institute for Molecular Science (LIMS), La Trobe University
    Australian Research Council Centre of Excellence for Advanced Molecular Imaging)

  • Jasper J. Cadusch

    (School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia)

  • Ann Roberts

    (School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia)

  • Brian Abbey

    (La Trobe Institute for Molecular Science (LIMS), La Trobe University
    Australian Research Council Centre of Excellence for Advanced Molecular Imaging)

  • Xiao-Cong Yuan

    (Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University)

  • Dingyuan Tang

    (School of Electrical and Electronic Engineering, Nanyang Technological University)

  • Jiao Lin

    (Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University
    School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia
    School of Electrical and Computer Engineering, RMIT University)

Abstract

The behaviour of light transmitted through an individual subwavelength aperture becomes counterintuitive in the presence of surrounding ‘decoration’, a phenomenon known as the extraordinary optical transmission. Despite being polarization-sensitive, such an individual nano-aperture, however, often cannot differentiate between the two distinct spin-states of photons because of the loss of photon information on light-aperture interaction. This creates a ‘blind-spot’ for the aperture with respect to the helicity of chiral light. Here we report the development of a subwavelength aperture embedded with metasurfaces dubbed a ‘meta-aperture’, which breaks this spin degeneracy. By exploiting the phase-shaping capabilities of metasurfaces, we are able to create specific meta-apertures in which the pair of circularly polarized light spin-states produces opposite transmission spectra over a broad spectral range. The concept incorporating metasurfaces with nano-apertures provides a venue for exploring new physics on spin-aperture interaction and potentially has a broad range of applications in spin-optoelectronics and chiral sensing.

Suggested Citation

  • Luping Du & Shan Shan Kou & Eugeniu Balaur & Jasper J. Cadusch & Ann Roberts & Brian Abbey & Xiao-Cong Yuan & Dingyuan Tang & Jiao Lin, 2015. "Broadband chirality-coded meta-aperture for photon-spin resolving," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms10051
    DOI: 10.1038/ncomms10051
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