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Issue 21, 2014
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Anomalous behavior of nearly-entire visible band manipulated with degenerated image dipole array

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Abstract

Recently, the control of anomalous light bending via flat gradient-phase metasurfaces has enabled many unprecedented applications. However, either low manipulation efficiency or challenging difficulties in fabrication hinders their practical applications, in particular in the visible range. Therefore, a concept of degenerated image dipole array is reported to realize anomalous light bending with high efficiency. A continuous phase delay varying rather than a discrete one, along with an in-plane wave vector is utilized to achieve anomalous light bending, by controlling and manipulating the mutual coupling between dipole array and the dipole array of its image. The anomalous light bending covers almost the entire visible range with broad incident angles, accompanied with preserved well-defined planar wavefront. In addition, this design is feasible to be fabricated with recent nanofabrication techniques due to its planarized surface configuration. The concept of imperfect image dipole array degenerated from ideal metamaterial absorbers surprisingly empowers significant enhancement in light manipulation efficiency for visible light in a distinct fashion.

Graphical abstract: Anomalous behavior of nearly-entire visible band manipulated with degenerated image dipole array

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Publication details

The article was received on 09 Jun 2014, accepted on 04 Aug 2014 and first published on 07 Aug 2014


Article type: Communication
DOI: 10.1039/C4NR03163F
Citation: Nanoscale, 2014,6, 12303-12309
  • Open access: Creative Commons BY-NC license
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    Anomalous behavior of nearly-entire visible band manipulated with degenerated image dipole array

    L. Zhang, J. Hao, M. Qiu, S. Zouhdi, J. K. W. Yang and C. Qiu, Nanoscale, 2014, 6, 12303
    DOI: 10.1039/C4NR03163F

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