title: Large-Area Nanoimprinted Colloidal Au Nanocrystal-Based Nanoantennas for Ultrathin Polarizing Plasmonic Metasurfaces.
abstract: We report a low-cost, large-area fabrication process using solution-based nanoimprinting and compact ligand exchange of colloidal Au nanocrystals to define anisotropic, subwavelength, plasmonic nanoinclusions for optical metasurfaces. Rod-shaped, Au nanocrystal-based nanoantennas possess strong, localized, plasmonic resonances able to control polarization. We fabricate metasurfaces from rod-shaped nanoantennas tailored in size and spacing to demonstrate Au nanocrystal-based quarter-wave plates that operate with extreme bandwidths and provide high polarization conversion efficiencies in the near-to-mid infrared.
authors.forename: Wenxiang
authors.initials: W
authors.lastname: Chen
authors.affiliation: ∥Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.
authors.forename: Mykhailo
authors.initials: M
authors.lastname: Tymchenko
authors.forename: Prashanth
authors.initials: P
authors.lastname: Gopalan
authors.forename: Xingchen
authors.initials: X
authors.lastname: Ye
authors.forename: Yaoting
authors.initials: Y
authors.lastname: Wu
authors.forename: Mingliang
authors.initials: M
authors.lastname: Zhang
authors.forename: Christopher B
authors.initials: CB
authors.lastname: Murray
authors.affiliation: ∥Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.
authors.forename: Andrea
authors.initials: A
authors.lastname: Alu
authors.forename: Cherie R
authors.initials: CR
authors.lastname: Kagan
mesh_terms: D016880:Anisotropy; D003102:Colloids / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D020349:Surface Plasmon Resonance; D013499:Surface Properties
chemical_list: D003102:Colloids; D006046:Gold
keywords: Plasmonics; metasurface; nanocrystals; nanoimprinting; optical nanoantennas; waveplate