Abstract
This article reports the study of infrared plasmonics with both random and periodic arrays of indium-tin-oxide (ITO) nanorods (NR). A description is given on the synthesis, patterning, and characterization of physical properties of the ITO NR arrays. A classical scattering model, along with a 3-D finite-element-method and a 3-D finite-difference-time-domain numerical simulation method has been used to interpret the unique light scattering phenomena. It is also shown that the intrinsic plasma frequency can be varied through careful postsynthesis processing of the ITO NRs. Examples are given on how coupled plasmon resonances can be tuned through patterning of the ITO NR arrays. In addition, environment dielectric sensing has been demonstrated through the shift of the resonances as a result of index change surrounding the NRs. These initial results suggest potential for further improvement and opportunities to develop a good understanding of infrared plasmonics using ITO and other transparent conducting oxide semiconducting materials.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 9161-9170 |
| Number of pages | 10 |
| Journal | ACS nano |
| Volume | 5 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 22 2011 |
Keywords
- degenerate semiconductors
- field enhancement
- infrared plasmonics
- nanorod
- sensing
- transparent conducting oxide
ASJC Scopus subject areas
- General Materials Science
- General Engineering
- General Physics and Astronomy