@article { ISI:000392464400004,
	title = {Anisotropic Surface Plasmon Polariton Generation Using Bimodal V-Antenna Based Metastructures},
	journal = {ACS PHOTONICS},
	volume = {4},
	number = {1},
	year = {2017},
	month = {JAN},
	pages = {22-27},
	publisher = {AMER CHEMICAL SOC},
	type = {Article},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	abstract = {V-shaped nanoantennas are among the popular choices for the unit element of a metasurface, a nanostructured surface used for its ability to mold and control the wavefront of light. In general, the motivation for choosing the V-antenna as the unit element comes from its bimodal nature, where the introduction of the second mode offers extra control over the scattered wavefronts. Here, through near-field scanning optical microscopy, we study a 1D metastructure comprised of V-antennas in the context of generating asymmetric surface plasmon polariton (SPP) wavefronts. The key point is that the use of the V-antenna allows for the creation of a two-dimensional phase gradient with a single line of antennas, where the extra phase dimension offers additional control and allows for asymmetric features. Two different asymmetries are created: (1) SPP wavefronts that have different propagation directions on either side of the metastructure, and (2) SPP wavefront asymmetry through focusing: one side of the metastructure focuses SPP wavefronts, while the other side has diverging SPP wavefronts.},
	keywords = {metamaterials, metasurfaces, nanoantennas, near-field scanning optical microscopy, Surface plasmon polaritons},
	issn = {2330-4022},
	doi = {10.1021/acsphotonics.6b00758},
	author = {Daniel Wintz and Antonio Ambrosio and Alexander Y. Zhu and Patrice Genevet and Federico Capasso}
}
