, Volume 8, Issue 1, pp 115–120 | Cite as

Plasmonic Core–Shell Nanowires for Enhanced Second-Harmonic Generation

  • J. RichterEmail author
  • A. Steinbrück
  • T. Pertsch
  • A. Tünnermann
  • R. Grange


We demonstrate the synthesis and characterization of core–shell nanowires consisting of a non-centrosymmetric KNbO3 core and a gold shell. This type of nanostructure combines the nonlinear optical properties of the core and the plasmonic resonance of the shell in the near infrared spectral range. We report successful spectroscopic measurements on coated single wires to characterize the resonant behavior of the gold shell. We present a theoretical model based on the electrostatic approximation to estimate the enhancement of second-harmonic generation in a nanowire due to the shell. It suggests a possible enhancement factor of up to 4,000 for a system with a nanoshell of 16 nm thickness at a wavelength of 900 nm.


Plasmonic nanostructures Chemical synthesis SHG Core-shell structures 



This work was supported and financed by the Jena School for Microbial Communication, the Carl Zeiss Foundation, and the Pro Chance program of the FSU Jena. Thanks go to C. Apfel for X-ray measurements, the IPHT for the equipment for zeta potential measurements, N. Janunts for setting up the spectroscope, and the nanooptics group at the Institute for Applied Physics for theoretical support.

Conflict of interest

The authors declare that they have no conflict of interest.


  1. 1.
    Wang ZL, Song J (2012) Piezoelectric nanogenerators based on zinc oxide nanowire arrays. Science 312(5771):242–246CrossRefGoogle Scholar
  2. 2.
    Bao J, Zimmler MA, Capasso F (2006) Broadband ZnO single-nanowire light-emitting diode. Nano Letters 6:1719–1722CrossRefGoogle Scholar
  3. 3.
    Voss T, Svacha GT, Mazur E, Mu S, Konjhodzic D, Marlow F, Müller S, Ronning C (2007) High-order waveguide modes in ZnO nanowires. Nano Letters 7:3675–3680CrossRefGoogle Scholar
  4. 4.
    Yum K, Na S, Xiang Y, Wang N, Yu M-F (2009) Mechanochemical delivery and dynamic tracking of fluorescent quantum dots in the cytoplasm and nucleus of living cells. Nano Letters 9Google Scholar
  5. 5.
    Singhal R, Orynbayeva Z, Venkat R, Sundaram K, Niu JJ, Bhattacharyya S, Vitol EA, Schrlau MG, Papazoglou ES, Friedman G, Gogotsi Y (2010) Multifunctional carbon-nanotube cellular endoscopes. Nat Nanotechnol 6:57–64CrossRefGoogle Scholar
  6. 6.
    Yan R, Park J-H, Choi Y, Heo C-J, Yang LP Lee S-M (2012) Nanowire-based single-cell endoscopy. Nat Nanotechnol 7:191–196CrossRefGoogle Scholar
  7. 7.
    Nakayama Y, Pauzauskie PJ, Radenovic A, Onorato RM, Saykally RJ, Liphardt J, Yang P (2007) Tunable nanowire nonlinear optical probe. Nature 447:1098–1101CrossRefGoogle Scholar
  8. 8.
    Grange R et al (2009) Lithium niobate nanowires synthesis, optical properties, and manipulation. Appl Phys Lett 95:143105–143105CrossRefGoogle Scholar
  9. 9.
    Pu Y, Grange R, Hsieh C-L, Psaltis D (2010) Nonlinear optical properties of core-shell nanocavities for enhanced second-harmonic generation. Phys Rev Lett 104:1–4CrossRefGoogle Scholar
  10. 10.
    Gobin M, Lee MH, Halas NJ, James WD, Drezek RA, West JL (2007) Near-infrared resonant nanoshells for combined optical imaging and photothermal cancer therapy. Nano Letters 9(5):2193–2198Google Scholar
  11. 11.
    Magrez A, Vasco E, Seo JW, Dieker C, Setter N, Forró L (2006) Growth of single-crystalline KNbO3 nanostructures. J Phys Chem B 110:58–61CrossRefGoogle Scholar
  12. 12.
    Katz L, Megaw HD (1967) Structure of potassium niobate at room temperature—solution of a pseudosymmetric structure by fourier methods. Acta Cryst 22:639–648Google Scholar
  13. 13.
    Hirsch LR, Jackson JB, Lee A, Halas NJ, West JL (2003) A whole blood immunoassay using gold nanoshells. Anal Chem 75:2377–2381CrossRefGoogle Scholar
  14. 14.
    Duff DG, Baiker A, Edwards PP (1993) A new hydrosol of gold clusters. 1. Formation and particle size variation. Langmuir 9:2301–2309CrossRefGoogle Scholar
  15. 15.
    Caruso F, Möhwald H (2011) Preparation and characterization of ordered nanoparticle and polymer composite multilayers on colloids. Langmuir 15(23):8276–8281CrossRefGoogle Scholar
  16. 16.
    Bohren CF, Huffman DR (1983) Absorption and scattering of light by small particles. Wiley, New YorkGoogle Scholar
  17. 17.
    Johnson PB, Christy RW (1972) Optical constants of the noble metals. Phys Rev B 6:4370–4379CrossRefGoogle Scholar
  18. 18.
    Boyd RW (2007) Nonlinear optics. Academic, New YorkGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • J. Richter
    • 1
    Email author
  • A. Steinbrück
    • 1
  • T. Pertsch
    • 1
  • A. Tünnermann
    • 1
    • 2
  • R. Grange
    • 1
  1. 1.Institute of Applied Physics, Abbe Center of PhotonicsFriedrich-Schiller Universität JenaJenaGermany
  2. 2.Fraunhofer Institute of Applied Optics and Precision EngineeringJenaGermany

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