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Title: Ultrafast light-induced symmetry changes in single BaTiO 3 nanowires

The coupling of light to nanoscale ferroelectric materials enables novel means of controlling their coupled degrees of freedom and engineering new functionality. Here we present femtosecond time-resolution nonlinear-optical measurements of light-induced dynamics within single ferroelectric barium titanate nanowires. By analyzing the time-dependent and polarization-dependent second harmonic intensity generated by the nanowire, we identify its crystallographic orientation and then make use of this information in order to probe its dynamic structural response and change in symmetry. Here, we show that photo-excitation leads to ultrafast, non-uniform modulations in the second order nonlinear susceptibility tensor, indicative of changes in the local symmetry of the nanostructure occurring on sub-picosecond time-scales.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ; ORCiD logo [2]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Grant/Contract Number:
1310545; AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. C
Additional Journal Information:
Journal Volume: 5; Journal Issue: 6; Journal ID: ISSN 2050-7526
Publisher:
Royal Society of Chemistry
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1353085

Kuo, Yi -Hong, Nah, Sanghee, He, Kai, Hu, Te, and Lindenberg, Aaron M. Ultrafast light-induced symmetry changes in single BaTiO3 nanowires. United States: N. p., Web. doi:10.1039/c6tc04448d.
Kuo, Yi -Hong, Nah, Sanghee, He, Kai, Hu, Te, & Lindenberg, Aaron M. Ultrafast light-induced symmetry changes in single BaTiO3 nanowires. United States. doi:10.1039/c6tc04448d.
Kuo, Yi -Hong, Nah, Sanghee, He, Kai, Hu, Te, and Lindenberg, Aaron M. 2017. "Ultrafast light-induced symmetry changes in single BaTiO3 nanowires". United States. doi:10.1039/c6tc04448d. https://www.osti.gov/servlets/purl/1353085.
@article{osti_1353085,
title = {Ultrafast light-induced symmetry changes in single BaTiO3 nanowires},
author = {Kuo, Yi -Hong and Nah, Sanghee and He, Kai and Hu, Te and Lindenberg, Aaron M.},
abstractNote = {The coupling of light to nanoscale ferroelectric materials enables novel means of controlling their coupled degrees of freedom and engineering new functionality. Here we present femtosecond time-resolution nonlinear-optical measurements of light-induced dynamics within single ferroelectric barium titanate nanowires. By analyzing the time-dependent and polarization-dependent second harmonic intensity generated by the nanowire, we identify its crystallographic orientation and then make use of this information in order to probe its dynamic structural response and change in symmetry. Here, we show that photo-excitation leads to ultrafast, non-uniform modulations in the second order nonlinear susceptibility tensor, indicative of changes in the local symmetry of the nanostructure occurring on sub-picosecond time-scales.},
doi = {10.1039/c6tc04448d},
journal = {Journal of Materials Chemistry. C},
number = 6,
volume = 5,
place = {United States},
year = {2017},
month = {1}
}

Works referenced in this record:

Enhancement of Ferroelectricity in Strained BaTiO3 Thin Films
journal, November 2004