Abstract
All-optical modulation of light using metallic nanostructures can potentially enable processing of information with speed in the terahertz range. This is because the optical nonlinearity of metals dictated by the electron-phonon coupling is intrinsically fast. Nobel metals have achieved great success to this end due to their superior plasmonic properties in the visible. However, each type of noble metals only works in a specific wavelength range and therefore broadband spectral response covering the wide visible spectrum can be a challenge. Here we introduce indium-tin-oxide nanorod arrays (ITO-NRAs) which exhibit broadband response covering the visible spectrum. We show that the static spectral response of ITO-NRAs does not depend on the incident polarization and is insensitive to whether the lattice is a square or a rectangle. We further demonstrate that the transmission spectrum can be slightly shifted by changing the sample temperature, as well as adjusting the doping concentration which can be achieved by annealing the sample in oxygen rich environments. When pumped by an optical pulse with photon energy above the bandgap, the transmission can be modified in the entire visible range. These preliminary results show that ITONRAs offer unique opportunities for all-optical modulation in optical frequencies.
| Original language | English |
|---|---|
| Title of host publication | Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV |
| Publisher | SPIE |
| Volume | 9921 |
| ISBN (Electronic) | 9781510602335 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | 2016 SPIE Optics + Photonics Conference on Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV - San Diego, United States Duration: Aug 28 2016 → Sep 1 2016 |
Other
| Other | 2016 SPIE Optics + Photonics Conference on Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV |
|---|---|
| Country | United States |
| City | San Diego |
| Period | 8/28/16 → 9/1/16 |
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Keywords
- All-optical modulation
- Indium-tin-oxide
- Nanorod
- Tin-doped indium oxide
- Visible spectrum
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Fine-tune the spectrum of indium-tin-oxide nanorod arrays in the visible range. / Guo, Peijun; Diroll, Benjamin T.; Ketterson, John B.; Schaller, Richard D; Chang, Robert P. H.
Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV. Vol. 9921 SPIE, 2016. 99211M.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Fine-tune the spectrum of indium-tin-oxide nanorod arrays in the visible range
AU - Guo, Peijun
AU - Diroll, Benjamin T.
AU - Ketterson, John B.
AU - Schaller, Richard D
AU - Chang, Robert P. H.
PY - 2016
Y1 - 2016
N2 - All-optical modulation of light using metallic nanostructures can potentially enable processing of information with speed in the terahertz range. This is because the optical nonlinearity of metals dictated by the electron-phonon coupling is intrinsically fast. Nobel metals have achieved great success to this end due to their superior plasmonic properties in the visible. However, each type of noble metals only works in a specific wavelength range and therefore broadband spectral response covering the wide visible spectrum can be a challenge. Here we introduce indium-tin-oxide nanorod arrays (ITO-NRAs) which exhibit broadband response covering the visible spectrum. We show that the static spectral response of ITO-NRAs does not depend on the incident polarization and is insensitive to whether the lattice is a square or a rectangle. We further demonstrate that the transmission spectrum can be slightly shifted by changing the sample temperature, as well as adjusting the doping concentration which can be achieved by annealing the sample in oxygen rich environments. When pumped by an optical pulse with photon energy above the bandgap, the transmission can be modified in the entire visible range. These preliminary results show that ITONRAs offer unique opportunities for all-optical modulation in optical frequencies.
AB - All-optical modulation of light using metallic nanostructures can potentially enable processing of information with speed in the terahertz range. This is because the optical nonlinearity of metals dictated by the electron-phonon coupling is intrinsically fast. Nobel metals have achieved great success to this end due to their superior plasmonic properties in the visible. However, each type of noble metals only works in a specific wavelength range and therefore broadband spectral response covering the wide visible spectrum can be a challenge. Here we introduce indium-tin-oxide nanorod arrays (ITO-NRAs) which exhibit broadband response covering the visible spectrum. We show that the static spectral response of ITO-NRAs does not depend on the incident polarization and is insensitive to whether the lattice is a square or a rectangle. We further demonstrate that the transmission spectrum can be slightly shifted by changing the sample temperature, as well as adjusting the doping concentration which can be achieved by annealing the sample in oxygen rich environments. When pumped by an optical pulse with photon energy above the bandgap, the transmission can be modified in the entire visible range. These preliminary results show that ITONRAs offer unique opportunities for all-optical modulation in optical frequencies.
KW - All-optical modulation
KW - Indium-tin-oxide
KW - Nanorod
KW - Tin-doped indium oxide
KW - Visible spectrum
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UR - http://www.scopus.com/inward/citedby.url?scp=85008500246&partnerID=8YFLogxK
U2 - 10.1117/12.2236163
DO - 10.1117/12.2236163
M3 - Conference contribution
VL - 9921
BT - Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV
PB - SPIE
ER -