Tunable plasmonic response of metallic nanoantennna heterodimer arrays modified by atomic-layer deposition

Raymond A. Wambold, Benjamin D. Borst, Jie Qi, Gary J. Weisel, Brian G. Willis, Darin T. Zimmerman

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a systematic study of tunable, plasmon extinction characteristics of arrays of nanoscale antennas that have potential use as sensors, energy-harvesting devices, catalytic converters, in near-field optical microscopy, and in surface-enhanced spectroscopy. Each device is composed of a palladium triangular-prism antenna and a flat counter-electrode. Arrays of devices are fabricated on silica using electron-beam lithography, followed by atomic-layer deposition of copper. Optical extinction is measured by employing a broadband light source in a confocal, transmission arrangement. We characterize the plasmon resonance behavior by examining the dependence on device length, the gap spacing between the electrodes, material properties, and the device array density, all of which contribute in varying degrees to the measured response. We employ finite-difference time-domain simulations to demonstrate good qualitative agreement between experimental trends and theory and use scanning electron microscopy to correlate plasmonic extinction characteristics with changes in morphology.

Original languageEnglish (US)
Article number026024
JournalJournal of Nanophotonics
Volume10
Issue number2
DOIs
StatePublished - Apr 1 2016

Fingerprint

Atomic layer deposition
atomic layer epitaxy
Antennas
Light extinction
Catalytic converters
Electrodes
Electron beam lithography
Energy harvesting
Palladium
Prisms
extinction
Silicon Dioxide
Optical microscopy
Light sources
Copper
Materials properties
Silica
Spectroscopy
antennas
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Wambold, Raymond A. ; Borst, Benjamin D. ; Qi, Jie ; Weisel, Gary J. ; Willis, Brian G. ; Zimmerman, Darin T. / Tunable plasmonic response of metallic nanoantennna heterodimer arrays modified by atomic-layer deposition. In: Journal of Nanophotonics. 2016 ; Vol. 10, No. 2.
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Tunable plasmonic response of metallic nanoantennna heterodimer arrays modified by atomic-layer deposition. / Wambold, Raymond A.; Borst, Benjamin D.; Qi, Jie; Weisel, Gary J.; Willis, Brian G.; Zimmerman, Darin T.

In: Journal of Nanophotonics, Vol. 10, No. 2, 026024, 01.04.2016.

Research output: Contribution to journalArticle

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