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13 November 2014 Manipulating wave propagation with geometric metasurfaces: fundamentals and applications
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The emerging field of metasurfaces has offered unprecedented functionalities for shaping wave fronts and optical responses. Here, we realize a new class of metasurfaces with nanorod array, which can generate abrupt interfacial phase changes to control local wave front at subwavelength scale. The physical mechanism under the phase modulation is geometry phase in essence, thus can achieve broadband operation, as well as helicity-dependent property. Multiple applications have been demonstrated, such as anomalous refraction, ultrathin dual-polarity metalenses, helicitydependent unidirectional surface plasmon polariton (SPP) excitation, and three-dimensional (3D) holography.
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Lingling Huang, Xianzhong Chen, Benfeng Bai, Qiaofeng Tan, Guofan Jin, Thomas Zentgraf, and Shuang Zhang "Manipulating wave propagation with geometric metasurfaces: fundamentals and applications", Proc. SPIE 9278, Plasmonics, 927804 (13 November 2014);

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