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Investigation of the near field distribution in circular nanostructures using Stokes polarization states

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Abstract

In this paper, the near field distribution patterns formed from nanostripe corral and half spiral are investigated. Various near field distribution patterns are generated owning to the interference of propagating surface plasmon waves that emerged from the nanoslits or nanostripe. The half spiral nanoslits are illuminated with Stokes polarizations. Each polarization state shows a different field pattern at different locations on the surface of metal film. This is due to the excitation of surface plasmon waves at different parts of the nanostructures when illuminated with different types of polarization states. The same Stokes polarization states are also illuminated on a nanostripe corral structure. In this case, dipolar field distributions are observed when illuminated with different linear polarization states, while optical vortices are observed for circular polarization. It is believed that these interesting field patterns due to different arrangements of nanostructures could be used for near field imaging and polarization sensing.

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Acknowledgements

The authors wish to acknowledge Professor Kenneth B. Crozier from Harvard University for his suggestions and discussions. The authors also wish to acknowledge ASTAR Grants #1021740172 and #12302FG012 for supporting this project.

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Authors and Affiliations

  1. Electronics and Photonics Department, A*STAR Institute of High Performance Computing, 1 Fusionopolis Way, Connexis, Singapore, 138632, Singapore

    E. H. Khoo, I. Ahmed, Z. Guo, V. Dixit, M. T. W. Ang & E. P. Li

  2. Engineering Science Program, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore

    Z. Guo

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  1. E. H. Khoo
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  2. I. Ahmed
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  3. Z. Guo
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  4. V. Dixit
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  5. M. T. W. Ang
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  6. E. P. Li
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Correspondence to E. H. Khoo.

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Khoo, E.H., Ahmed, I., Guo, Z. et al. Investigation of the near field distribution in circular nanostructures using Stokes polarization states. Appl. Phys. A 112, 597–603 (2013). https://doi.org/10.1007/s00339-013-7756-6

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  • DOI: https://doi.org/10.1007/s00339-013-7756-6

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