Tunable optical extinction of nano-antennas for solar energy conversion from near-infrared to visible

Raymond A. Wambold, James M. Chen, Paul H. Cutler, Nicholas M. Miskovsky, Jie Qi, Gary J. Weisel, Brian G. Willis, Darin T. Zimmerman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


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 surfaced-enhanced spectroscopy. Each device is composed of a palladium triangular-prism antenna and a flat counterelectrode. Arrays of devices are fabricated on silica using electron-beam lithography, followed by atomic-layer deposition (ALD) of copper. Optical extinction is measured by employing a broadband light source in a confocal, transmission arrangement. We demonstrate that the plasmon resonance in the extinction may be tailored by varying lithography conditions and is modified significantly by ALD. Most important, is the ability to control the gap spacing between the two electrodes, which, along with overall size, morphology, and material properties, modifies the plasmon resonance. We employ Finite-Difference Time-Domain simulations to demonstrate good agreement between experimental data and theory and use scanning electron microscopy to correlate plasmonic extinction characteristics with changes in morphology.

Original languageEnglish (US)
Title of host publicationPlasmonics
Subtitle of host publicationMetallic Nanostructures and Their Optical Properties XIII
EditorsDin Ping Tsai, Allan D. Boardman
ISBN (Electronic)9781628417135
StatePublished - 2015
EventPlasmonics: Metallic Nanostructures and Their Optical Properties XIII - San Diego, United States
Duration: Aug 9 2015Aug 13 2015

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherPlasmonics: Metallic Nanostructures and Their Optical Properties XIII
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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