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Title: Large optical nonlinearity of ITO nanorods for sub-picosecond all-optical modulation of the full-visible spectrum

Optical nonlinearity induced by intense optical excitation of mobile electrons in metallic nanostructures can provide dynamic tuning of their electromagnetic response, which is potentially useful for all-optical information processing. Here we report on the sub-picosecond optical nonlinearity of indium tin oxide nanorod arrays (ITO-NRAs) following intraband, on-plasmon-resonance optical pumping, which enables modulation of the full-visible spectrum with large absolute change of transmission, favorable spectral tunability and beam-steering capability. We semi-quantitatively model the permittivity change, whose large amplitude stems from a significant electron redistribution under intraband pumping due to the low electron concentration. Further, we observe a transient response in the microsecond regime associated with the slow lattice cooling, which arises from the large aspect-ratio and low thermal conductivity of ITO-NRAs. Finally, our results demonstrate that all-optical control of the visible spectrum can be achieved by using heavily doped wide-bandgap semiconductors in their transparent regime with speed faster than that of noble metals.
Authors:
ORCiD logo [1] ;  [2] ; ORCiD logo [3] ;  [3] ;  [1] ;  [1]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States); Northwestern Univ., Evanston, IL (United States)
  3. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
National Science Foundation (NSF) - Directorate for Mathematical and Physical Sciences Division of Materials Research (MPS-DMR); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Scientific User Facilities Division
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; metamaterials; nanophotonics and plasmonics; nonlinear optics; ultrafast photonics
OSTI Identifier:
1362297

Guo, Peijun, Schaller, Richard D., Ocola, Leonidas E., Diroll, Benjamin T., Ketterson, John B., and Chang, Robert P. H.. Large optical nonlinearity of ITO nanorods for sub-picosecond all-optical modulation of the full-visible spectrum. United States: N. p., Web. doi:10.1038/ncomms12892.
Guo, Peijun, Schaller, Richard D., Ocola, Leonidas E., Diroll, Benjamin T., Ketterson, John B., & Chang, Robert P. H.. Large optical nonlinearity of ITO nanorods for sub-picosecond all-optical modulation of the full-visible spectrum. United States. doi:10.1038/ncomms12892.
Guo, Peijun, Schaller, Richard D., Ocola, Leonidas E., Diroll, Benjamin T., Ketterson, John B., and Chang, Robert P. H.. 2016. "Large optical nonlinearity of ITO nanorods for sub-picosecond all-optical modulation of the full-visible spectrum". United States. doi:10.1038/ncomms12892. https://www.osti.gov/servlets/purl/1362297.
@article{osti_1362297,
title = {Large optical nonlinearity of ITO nanorods for sub-picosecond all-optical modulation of the full-visible spectrum},
author = {Guo, Peijun and Schaller, Richard D. and Ocola, Leonidas E. and Diroll, Benjamin T. and Ketterson, John B. and Chang, Robert P. H.},
abstractNote = {Optical nonlinearity induced by intense optical excitation of mobile electrons in metallic nanostructures can provide dynamic tuning of their electromagnetic response, which is potentially useful for all-optical information processing. Here we report on the sub-picosecond optical nonlinearity of indium tin oxide nanorod arrays (ITO-NRAs) following intraband, on-plasmon-resonance optical pumping, which enables modulation of the full-visible spectrum with large absolute change of transmission, favorable spectral tunability and beam-steering capability. We semi-quantitatively model the permittivity change, whose large amplitude stems from a significant electron redistribution under intraband pumping due to the low electron concentration. Further, we observe a transient response in the microsecond regime associated with the slow lattice cooling, which arises from the large aspect-ratio and low thermal conductivity of ITO-NRAs. Finally, our results demonstrate that all-optical control of the visible spectrum can be achieved by using heavily doped wide-bandgap semiconductors in their transparent regime with speed faster than that of noble metals.},
doi = {10.1038/ncomms12892},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {9}
}