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


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.

SUBMITTER: Du L 

PROVIDER: S-EPMC4686760 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature

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

Du Luping L   Kou Shan Shan SS   Balaur Eugeniu E   Cadusch Jasper J JJ   Roberts Ann A   Abbey Brian B   Yuan Xiao-Cong XC   Tang Dingyuan D   Lin Jiao J  

Nature communications 20151202


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 t  ...[more]

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