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Title: Ultrafast dynamics of metal plasmons induced by 2D semiconductor excitons in hybrid nanostructure arrays

Abstract

With the advanced progress achieved in the field of nanotechnology, localized surface plasmons resonances (LSPRs) are actively considered to improve the efficiency of metal-based photocatalysis, photodetection, and photovoltaics. Here, we report on the exchange of energy and electric charges in a hybrid composed of a two-dimensional tungsten disulfide (2D-WS2) monolayer and an array of aluminum (Al) nanodisks. Femtosecond pump-probe spectroscopy results indicate that within ~830 fs after photoexcitation of the 2D-WS2 semiconductor, energy transfer from the 2D-WS2 excitons excites the plasmons of the Al array. Then, upon the radiative and/or nonradiative damping of these excited plasmons, energy and/or electron transfer back to the 2D-WS2 semiconductor takes place as indicated by an increase in the reflected probe at the 2D exciton transition energies at later time-delays. This simultaneous exchange of energy and charges between the metal and the 2D-WS2 semiconductor resulted in an extension of the average lifetime of the 2D-excitons from ~15 to ~58 ps in absence and presence of the Al array, respectively. Furthermore, the indirectly excited plasmons were found to live as long as the 2D-WS2 excitons exist. Furthermore, the demonstrated ability to generate exciton-plasmons coupling in a hybrid nanostructure may open new opportunities for optoelectronic applications suchmore » as plasmonic-based photodetection and photocatalysis.« less

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Georgia State Univ., Atlanta, GA (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1337500
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
ACS Photonics
Additional Journal Information:
Journal Volume: 3; Journal Issue: 12; Journal ID: ISSN 2330-4022
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; Ultrafast dynamics; Spectroscopy; Excitons; Plasmons; 2D Materials

Citation Formats

Boulesbaa, Abdelaziz, Babicheva, Viktoriia E., Wang, Kai, Kravchenko, Ivan I., Lin, Ming -Wei, Mahjouri-Samani, Masoud, Jacobs, Christopher B., Puretzky, Alexander A., Xiao, Kai, Ivanov, Ilia N., Rouleau, Christopher M., and Geohegan, David B. Ultrafast dynamics of metal plasmons induced by 2D semiconductor excitons in hybrid nanostructure arrays. United States: N. p., 2016. Web. doi:10.1021/acsphotonics.6b00618.
Boulesbaa, Abdelaziz, Babicheva, Viktoriia E., Wang, Kai, Kravchenko, Ivan I., Lin, Ming -Wei, Mahjouri-Samani, Masoud, Jacobs, Christopher B., Puretzky, Alexander A., Xiao, Kai, Ivanov, Ilia N., Rouleau, Christopher M., & Geohegan, David B. Ultrafast dynamics of metal plasmons induced by 2D semiconductor excitons in hybrid nanostructure arrays. United States. https://doi.org/10.1021/acsphotonics.6b00618
Boulesbaa, Abdelaziz, Babicheva, Viktoriia E., Wang, Kai, Kravchenko, Ivan I., Lin, Ming -Wei, Mahjouri-Samani, Masoud, Jacobs, Christopher B., Puretzky, Alexander A., Xiao, Kai, Ivanov, Ilia N., Rouleau, Christopher M., and Geohegan, David B. Thu . "Ultrafast dynamics of metal plasmons induced by 2D semiconductor excitons in hybrid nanostructure arrays". United States. https://doi.org/10.1021/acsphotonics.6b00618. https://www.osti.gov/servlets/purl/1337500.
@article{osti_1337500,
title = {Ultrafast dynamics of metal plasmons induced by 2D semiconductor excitons in hybrid nanostructure arrays},
author = {Boulesbaa, Abdelaziz and Babicheva, Viktoriia E. and Wang, Kai and Kravchenko, Ivan I. and Lin, Ming -Wei and Mahjouri-Samani, Masoud and Jacobs, Christopher B. and Puretzky, Alexander A. and Xiao, Kai and Ivanov, Ilia N. and Rouleau, Christopher M. and Geohegan, David B.},
abstractNote = {With the advanced progress achieved in the field of nanotechnology, localized surface plasmons resonances (LSPRs) are actively considered to improve the efficiency of metal-based photocatalysis, photodetection, and photovoltaics. Here, we report on the exchange of energy and electric charges in a hybrid composed of a two-dimensional tungsten disulfide (2D-WS2) monolayer and an array of aluminum (Al) nanodisks. Femtosecond pump-probe spectroscopy results indicate that within ~830 fs after photoexcitation of the 2D-WS2 semiconductor, energy transfer from the 2D-WS2 excitons excites the plasmons of the Al array. Then, upon the radiative and/or nonradiative damping of these excited plasmons, energy and/or electron transfer back to the 2D-WS2 semiconductor takes place as indicated by an increase in the reflected probe at the 2D exciton transition energies at later time-delays. This simultaneous exchange of energy and charges between the metal and the 2D-WS2 semiconductor resulted in an extension of the average lifetime of the 2D-excitons from ~15 to ~58 ps in absence and presence of the Al array, respectively. Furthermore, the indirectly excited plasmons were found to live as long as the 2D-WS2 excitons exist. Furthermore, the demonstrated ability to generate exciton-plasmons coupling in a hybrid nanostructure may open new opportunities for optoelectronic applications such as plasmonic-based photodetection and photocatalysis.},
doi = {10.1021/acsphotonics.6b00618},
journal = {ACS Photonics},
number = 12,
volume = 3,
place = {United States},
year = {Thu Nov 17 00:00:00 EST 2016},
month = {Thu Nov 17 00:00:00 EST 2016}
}

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