Giant birefringence in optical antenna arrays with widely tailorable optical anisotropy
By Mikhail A. Kats, Patrice Genevet, G. Aoust, N. Yu, R. Blanchard, F. Aieta, Z. Gaburro, F. Capasso. Proceedings of the National Academy of Sciences of the United States of America, 2012
207 citations recorded by the source corpus.
The manipulation of light by conventional optical components such as lenses, prisms, and waveplates involves engineering of the wavefront as it propagates through an optically thick medium. A unique class of flat optical components with high functionality can be designed by introducing abrupt phase shifts into the optical path, utilizing the resonant response of arrays of scatterers with deeply subwavelength thickness. As an application of this concept, we report a theoretical and experimental study of birefringent arrays of two-dimensional (V- and Y-shaped) optical antennas which support two orthogonal charge-oscillation modes and serve as broadband, anisotropic optical elements that can be used to locally tailor the amplitude, phase, and polarization of light. The degree of optical anisotropy can be designed by controlling the interference between the waves scattered by the antenna modes; in particular, we observe a striking effect in which the anisotropy disappears as a result of destructive interference. These properties are captured by a simple, physical model in which the antenna modes are treated as independent, orthogonally oriented harmonic oscillators.
Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/7bf91067e78746a62843eafa0ab4f381c2c443d2
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Citations in the corpus
- Multiwavelength achromatic metasurfaces by dispersive phase compensation (2014, background): “usually refers to the broadband response of the resonators, which is the result of the high radiation losses necessary for high scattering efficiency and, to a lesser extent, of the absorption losses (6, 17). As a consequence, the phase function implemented by the metasurface can be relatively const”
- Metasurface holography: from fundamentals to applications (2018, background): “tral width of the resonance. This resonant phase behavior is the basis of several phase gradient metasurface devices. The most popular strategy uses basic antenna elements (i.e. V-shape [11], Y-shape [45], C-shape [46], etc.) to build up more complex meta-atoms. The meta-atom separation should be sm”
- A review of metasurfaces: physics and applications (2016, background): “efficiency is nearly constant and the phase response is approximately linear [33, 34].”