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Proceedings Paper

Imaging of waveguiding and scattering interferences in individual GaAs nanowires via second-harmonic generation
Author(s): Rachel Grange; Gerald Brönstrup; Anton Sergeyev; Jessica Richter; Thomas Pertsch; Andreas Tünnermann; Silke Christiansen; Christian Leiterer; Wolfgang Fritzsche; Christoph Gutsche; Andrey Lysov; Werner Prost; Franz-Josef Tegude
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Paper Abstract

We use the nonlinear optical property of GaAs to directly visualize the path of the near infrared incident laser light coupled into individual nanowires. We fully illuminate with near infrared pulse laser untapered and tapered GaAs nanowires grown via the Au-assisted vapor-liquid-solid mechanism. We record second-harmonic generation (SHG) signals in the visible spectrum. In some nanowires, an interference pattern is observed and investigated in terms of distances between the maxima of the SHG signal taking into account the effective refractive index in such sub wavelength structures with radius below 90 nm. We propose a model to explain the periodicity of the maxima in the SHG interference pattern. The theoretical model includes the waveguiding and the Mie scattering theories for obtaining the 2π periodicity fitting well the experiments. Moreover, we also measure interferences in tapererd nanowires with a radius down to 76 nm. The possible effect of the gold in non radiative recombination and the presence of the gold particle at the tip of some nanowires are also discussed.

Paper Details

Date Published: 1 May 2012
PDF: 6 pages
Proc. SPIE 8424, Nanophotonics IV, 84241J (1 May 2012); doi: 10.1117/12.921758
Show Author Affiliations
Rachel Grange, Friedrich-Schiller-Univ. Jena (Germany)
Gerald Brönstrup, Max Planck Institute for the Science of Light (Germany)
Anton Sergeyev, Friedrich-Schiller-Univ. Jena (Germany)
Jessica Richter, Friedrich-Schiller-Univ. Jena (Germany)
Thomas Pertsch, Friedrich-Schiller-Univ. Jena (Germany)
Andreas Tünnermann, Friedrich-Schiller-Univ. Jena (Germany)
Fraunhofer Institute of Applied Optics and Precision Engineering (Germany)
Silke Christiansen, Max Planck Institute for the Science of Light (Germany)
Christian Leiterer, Institut für Photonische Technologien e.V. (Germany)
Wolfgang Fritzsche, Institut für Photonische Technologien e.V. (Germany)
Christoph Gutsche, Univ. Duisburg-Essen (Germany)
Andrey Lysov, Univ. Duisburg-Essen (Germany)
Werner Prost, Univ. Duisburg-Essen (Germany)
Franz-Josef Tegude, Univ. Duisburg-Essen (Germany)

Published in SPIE Proceedings Vol. 8424:
Nanophotonics IV
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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