Independence of optical absorption on Auger ionization in single-walled carbon nanotubes revealed by ultrafast e-h photodoping
Anderson, Mitchell D.; Beattie, Meghan N.; Alexander-Webber, Jack A.; Nicholas, Robin J.; Fraser, James M.
2016

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Abstract

Auger-ionized free-carriers in a one-dimensional semiconductor are predicted to result in a strong band-gap renormalization. Isolated single-walled carbon nanotubes (SWCNT) under high-intensity laser irradiation exhibit strong nonlinear photoluminescence (PL) due to exciton-exciton annihilation (EEA). The presence of exciton disassociation during the rapid Auger-ionization caused by EEA would lead to a strong nonlinear absorption. By simultaneously measuring SWCNT-PL and optical absorption of isolated SWCNT clusters in the PL saturation regime, we give evidence that Auger-ionized excitons do not disassociate but remain bound.

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Title Independence of optical absorption on Auger ionization in single-walled carbon nanotubes revealed by ultrafast e-h photodoping
Author(s) Anderson, Mitchell D. ; Beattie, Meghan N. ; Alexander-Webber, Jack A. ; Nicholas, Robin J. ; Fraser, James M.
Published in New Journal Of Physics
Pagination 7
Volume 18
Pages 023051
Date 2016
Publisher Bristol, Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft
ISSN 1367-2630
Keywords
DOI https://doi.org/10.1088/1367-2630/18/2/023051
Other identifier(s) View record in Web of Science
Laboratories LOEQ
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SB Archives > LOEQ - Laboratory of Quantum Optoelectronics
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2016-07-19

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