Infrared plasmonics via ZnO

J. W. Allen, M. S. Allen, D. C. Look, B. R. Wenner, Naho Itagaki, K. Matsushima, I. Surhariadi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Conventional plasmonic devices involve metals, but metal-based plasmonic resonances are mainly limited to λres < 1 μm, and thus metals interact effectively only with light in the UV and visible ranges. We show that highly doped ZnO can exhibit λres ≥ 1 μm, thus moving plasmonics into the IR range. We illustrate this capability with a set of thin (d = 25-147 nm) Al-doped ZnO (AZO) layers grown by RF sputtering on quartz glass. These samples employ a unique, 20-nmthick, ZnON buffer layer, which minimizes the strong thickness dependence of mobility (μ) on thickness (d). A practical waveguide structure, using these measurements, is simulated with COMSOL Multiphysics software over a mid-IR wavelength range of 4-10 μm, with a detailed examination of propagation loss and plasmon confinement dimension. In many cases, Lplas < λlight, thus showing that IR light can be manipulated in semiconductor materials at dimensions below the diffraction limit.

Original languageEnglish
Pages (from-to)109-119
Number of pages11
JournalJournal of Nano Research
Volume28
DOIs
Publication statusPublished - Jul 6 2014

Fingerprint

Metals
Infrared radiation
metals
Quartz
Buffer layers
Sputtering
Waveguides
quartz
buffers
Diffraction
examination
sputtering
Semiconductor materials
waveguides
computer programs
Glass
Wavelength
propagation
glass
diffraction

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Allen, J. W., Allen, M. S., Look, D. C., Wenner, B. R., Itagaki, N., Matsushima, K., & Surhariadi, I. (2014). Infrared plasmonics via ZnO. Journal of Nano Research, 28, 109-119. https://doi.org/10.4028/www.scientific.net/JNanoR.28.109

Infrared plasmonics via ZnO. / Allen, J. W.; Allen, M. S.; Look, D. C.; Wenner, B. R.; Itagaki, Naho; Matsushima, K.; Surhariadi, I.

In: Journal of Nano Research, Vol. 28, 06.07.2014, p. 109-119.

Research output: Contribution to journalArticle

Allen, JW, Allen, MS, Look, DC, Wenner, BR, Itagaki, N, Matsushima, K & Surhariadi, I 2014, 'Infrared plasmonics via ZnO', Journal of Nano Research, vol. 28, pp. 109-119. https://doi.org/10.4028/www.scientific.net/JNanoR.28.109
Allen JW, Allen MS, Look DC, Wenner BR, Itagaki N, Matsushima K et al. Infrared plasmonics via ZnO. Journal of Nano Research. 2014 Jul 6;28:109-119. https://doi.org/10.4028/www.scientific.net/JNanoR.28.109
Allen, J. W. ; Allen, M. S. ; Look, D. C. ; Wenner, B. R. ; Itagaki, Naho ; Matsushima, K. ; Surhariadi, I. / Infrared plasmonics via ZnO. In: Journal of Nano Research. 2014 ; Vol. 28. pp. 109-119.
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