title: High-order waveguide modes in ZnO nanowires.
abstract: We use tapered silica fibers to inject laser light into ZnO nanowires with diameters around 250 nm to study their waveguiding properties. We find that high-order waveguide modes are frequently excited and carry significant intensity at the wire surface. Numerical simulations reproduce the experimental observations and indicate a coupling efficiency between silica and ZnO nanowires of 50%. Experimentally, we find an emission angle from the ZnO nanowires of about 90 degrees , which is in agreement with the simulations.
authors.affiliation: Department of Physics and School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
authors.forename: Tobias
authors.initials: T
authors.lastname: Voss
authors.forename: Geoffry T
authors.initials: GT
authors.lastname: Svacha
authors.forename: Eric
authors.initials: E
authors.lastname: Mazur
authors.forename: Sven
authors.initials: S
authors.lastname: Müller
authors.forename: Carsten
authors.initials: C
authors.lastname: Ronning
authors.forename: Denan
authors.initials: D
authors.lastname: Konjhodzic
authors.forename: Frank
authors.initials: F
authors.lastname: Marlow
mesh_terms: D007834:Lasers; D053770:Nanowires / Q000737:chemistry*; D012666:Semiconductors; D012822:Silicon Dioxide / Q000737:chemistry; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D012822:Silicon Dioxide; D015034:Zinc Oxide