Diffraction-free surface waves by metasurfaces.

We propose a method to design and realize planar Bessel lens using artificial metasurfaces to produce diffraction-free surface waves. The planar Bessel lens is composed of two sublenses: a half Maxwell fisheye lens which can shape the surface cylindrical waves to surface plane waves, and an inhomogeneous flat lens which can convert the surface plane waves into approximate diffraction-free surface waves in a diamond-shaped focusing area. Through the planar Bessel lens, a point source on the metasurface directly radiates the diffraction-free surface waves. In realization, we construct the inhomogeneous metasurfaces by subwavelength metallic patches printed on a grounded dielectric substrate. Simulation and experimental results have good agreements, which jointly show the formation of the diffraction-free surface waves in the microwave band.

[1]  Ekmel Ozbay,et al.  Generation of an axially asymmetric Bessel-like beam from a metallic subwavelength aperture. , 2009, Physical review letters.

[2]  Xiang Wan,et al.  A broadband transformation-optics metasurface lens , 2014 .

[3]  H. Ma,et al.  Three-Dimensional Gradient-Index Materials and Their Applications in Microwave Lens Antennas , 2013, IEEE Transactions on Antennas and Propagation.

[4]  D. Smith,et al.  Gradient index metamaterials. , 2005, Physical review. E, Statistical, nonlinear, and soft matter physics.

[5]  Amit M. Patel,et al.  A Printed Leaky-Wave Antenna Based on a Sinusoidally-Modulated Reactance Surface , 2011, IEEE Transactions on Antennas and Propagation.

[6]  D. R. Chowdhury,et al.  Terahertz Metamaterials for Linear Polarization Conversion and Anomalous Refraction , 2013, Science.

[7]  Miceli,et al.  Diffraction-free beams. , 1987, Physical review letters.

[8]  F. Capasso,et al.  Polarization-Controlled Tunable Directional Coupling of Surface Plasmon Polaritons , 2013, Science.

[9]  Y. Wang,et al.  Photonic Spin Hall Effect at Metasurfaces , 2013, Science.

[10]  Victor Coello,et al.  Generation of diffraction-free plasmonic beams with one-dimensional Bessel profiles. , 2013, Optics letters.

[11]  Yuri S. Kivshar,et al.  Polarization Traffic Control for Surface Plasmons , 2013, Science.

[12]  C. Pfeiffer,et al.  Metamaterial Huygens' surfaces: tailoring wave fronts with reflectionless sheets. , 2013, Physical review letters.

[13]  Neil McArdle,et al.  Efficient generation of nearly diffraction-free beams using an axicon , 1992 .

[14]  Qiaofeng Tan,et al.  Dual-polarity plasmonic metalens for visible light , 2012, Nature Communications.

[15]  D. Sievenpiper,et al.  Scalar and Tensor Holographic Artificial Impedance Surfaces , 2010, IEEE Transactions on Antennas and Propagation.

[16]  N. Yu,et al.  Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and Refraction , 2011, Science.

[17]  A. Alú,et al.  Full control of nanoscale optical transmission with a composite metascreen. , 2013, Physical review letters.

[18]  Simon A. R. Horsley,et al.  Thin metamaterial Luneburg lens for surface waves , 2013 .

[19]  H. Kurt,et al.  Generation of a two-dimensional limited-diffraction beam with self-healing ability by annular-type photonic crystals , 2012 .

[20]  Shulin Sun,et al.  Gradient-index meta-surfaces as a bridge linking propagating waves and surface waves. , 2012, Nature materials.

[21]  C. Pfeiffer,et al.  Millimeter-Wave Transmitarrays for Wavefront and Polarization Control , 2013, IEEE Transactions on Microwave Theory and Techniques.

[22]  F. Caminita,et al.  Non-Uniform Metasurface Luneburg Lens Antenna Design , 2012, IEEE Transactions on Antennas and Propagation.

[23]  N. Engheta,et al.  Homogenization of plasmonic metasurfaces modeled as transmission-line loads , 2011 .

[24]  M. Ettorre,et al.  Generation of Propagating Bessel Beams Using Leaky-Wave Modes: Experimental Validation , 2012, IEEE Transactions on Antennas and Propagation.

[25]  Nader Engheta,et al.  Transformation Optics Using Graphene , 2011, Science.

[26]  C. Holloway,et al.  Averaged transition conditions for electromagnetic fields at a metafilm , 2003 .

[27]  A. Grbic,et al.  Generating Evanescent Bessel Beams Using Near-Field Plates , 2012, IEEE Transactions on Antennas and Propagation.

[28]  C. Pfeiffer,et al.  Cascaded metasurfaces for complete phase and polarization control , 2013 .

[29]  P. Genevet,et al.  Cosine-Gauss plasmon beam: a localized long-range nondiffracting surface wave. , 2012, Physical review letters.

[30]  Adour V. Kabakian,et al.  Surface-Wave Waveguides , 2011 .

[31]  David R. Smith,et al.  An Overview of the Theory and Applications of Metasurfaces: The Two-Dimensional Equivalents of Metamaterials , 2012, IEEE Antennas and Propagation Magazine.

[32]  N. Yu,et al.  Flat optics with designer metasurfaces. , 2014, Nature materials.

[33]  F. Caminita,et al.  Spiral Leaky-Wave Antennas Based on Modulated Surface Impedance , 2011, IEEE Transactions on Antennas and Propagation.

[34]  R. Blanchard,et al.  Aberration-free ultrathin flat lenses and axicons at telecom wavelengths based on plasmonic metasurfaces. , 2012, Nano letters.

[35]  David R. Smith,et al.  Metamaterial Electromagnetic Cloak at Microwave Frequencies , 2006, Science.

[36]  A. Oliner,et al.  Guided waves on sinusoidally-modulated reactance surfaces , 1959 .

[37]  M. Ettorre,et al.  Generation of Propagating Bessel Beams Using Leaky-Wave Modes , 2012, IEEE Transactions on Antennas and Propagation.

[38]  David R. Smith,et al.  Metamaterials and Negative Refractive Index , 2004, Science.