title: Subdiffraction photon guidance by quantum-dot cascades.
abstract: We report on a waveguide composed of a cascade of gain-enabled quantum dots with subwavelength dimensions. Fabrication is demonstrated through DNA-mediated self-assembly and a two-layer molecular self-assembly process that enables rapid prototyping. The device, which is identified with fluorescence microscopy and tested by optical near field detection, allows optical signal transfer at a well-defined wavelength in flexible routing geometry, such as straight paths and 90 degrees bends. The structure serves as a critical building block for nanophotonic systems with high integration density.
authors.affiliation: Department of Electrical Engineering, Department of Physics, University of Washington, Seattle, Washington 98195, USA.
authors.forename: Chia-Jean
authors.initials: CJ
authors.lastname: Wang
authors.forename: Ludan
authors.initials: L
authors.lastname: Huang
authors.forename: Babak A
authors.initials: BA
authors.lastname: Parviz
authors.forename: Lih Y
authors.initials: LY
authors.lastname: Lin
mesh_terms: D000327:Adsorption; D003102:Colloids / Q000737:chemistry; D003460:Crystallization; D004247:DNA / Q000737:chemistry; D008856:Microscopy, Fluorescence / Q000379:methods; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D010100:Oxygen / Q000737:chemistry; D017785:Photons; D019904:Polymethyl Methacrylate / Q000737:chemistry; D045663:Quantum Dots; D012680:Sensitivity and Specificity; D013499:Surface Properties
chemical_list: D003102:Colloids; D004247:DNA; D019904:Polymethyl Methacrylate; D010100:Oxygen