Wei, LiuNeshev, DragomirShadrivov, IlyaMiroshnichenko, AndreyKivshar, Yuri2015-12-10May 22-269781457705335http://hdl.handle.net/1885/55837We introduce the concept of polychromatic plasmonics and demonstrate a broadband lens for nanofocusing of surface plasmons. This lens has a bandwidth more than an optical octave thus opening opportunities for broadband plasmonic applications.Keywords: Nano-focusing; Plasmonic; Plasmonics; Surface plasmons; Lenses; Optics; Plasmons20112016-02-24