title: Plasmon-induced transparency in the visible region via self-assembled gold nanorod heterodimers.
abstract: The phenomenon of plasmon-induced transparency holds immense potential for high sensitivity sensors and optical information processing due to the extreme dispersion and slowing of light within a narrow spectral window. Unfortunately plasmonic metamaterials demonstrating this effect has been restricted to infrared and greater wavelengths due to requisite precision in structure fabrication. Here we report a novel metamaterial synthesized by bottom-up self-assembly of gold nanorods. The small dimensions (≤ 50/20 nm, length/diameter), atomically smooth surfaces, and nanometer resolution enable the first demonstration of plasmon-induced transparency at visible wavelengths. The slow-down factors within the reduced symmetry heterodimer cluster are comparable to longer wavelength counterparts. The inherent spectral tunability and facile large-scale integration afforded by self-assembled metamaterials will open a new paradigm for physically realizable on-chip photonic device designs.
authors.affiliation: Air Force Research Laboratory, Wright Patterson Air Force Base , 2941 Hobson Way, Wright Patterson Air Force Base, Ohio 45433, United States.
authors.forename: Sushmita
authors.initials: S
authors.lastname: Biswas
authors.forename: Jinsong
authors.initials: J
authors.lastname: Duan
authors.forename: Dhriti
authors.initials: D
authors.lastname: Nepal
authors.forename: Kyoungweon
authors.initials: K
authors.lastname: Park
authors.forename: Ruth
authors.initials: R
authors.lastname: Pachter
authors.forename: Richard A
authors.initials: RA
authors.lastname: Vaia
mesh_terms: D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D017785:Photons; D020349:Surface Plasmon Resonance; D013499:Surface Properties
chemical_list: D006046:Gold