Dynamics of strongly degenerate electron-hole Plasmas and excitons in single InP nanowires

Titova, L.V., Hoang, T.B., Yarrison-Rice, J.M., Jackson, H.E., Kim, Y., Joyce, H.J., Gao, Q., Tan, H.H., Jagadish, C., Zhang, X., Zou, J. and Smith, LM (2007) Dynamics of strongly degenerate electron-hole Plasmas and excitons in single InP nanowires. Nano Letters, 7 11: 3383-3387. doi:10.1021/nl071733l


Author Titova, L.V.
Hoang, T.B.
Yarrison-Rice, J.M.
Jackson, H.E.
Kim, Y.
Joyce, H.J.
Gao, Q.
Tan, H.H.
Jagadish, C.
Zhang, X.
Zou, J.
Smith, LM
Title Dynamics of strongly degenerate electron-hole Plasmas and excitons in single InP nanowires
Journal name Nano Letters   Check publisher's open access policy
ISSN 1530-6984
Publication date 2007
Year available 2007
Sub-type Article (original research)
DOI 10.1021/nl071733l
Volume 7
Issue 11
Start page 3383
End page 3387
Total pages 5
Editor Alivisatos, A.P.
Place of publication Washington
Publisher Amer Chemical Soc
Collection year 2008
Language eng
Subject 291804 Nanotechnology
780102 Physical sciences
C1
Abstract Low-temperature time-resolved photoluminescence spectroscopy is used to probe the dynamics of photoexcited carriers in single InP nanowires. At early times after pulsed excitation, the photoluminescence line shape displays a characteristic broadening, consistent with emission from a degenerate, high-density electron-hole plasma. As the electron-hole plasma cools and the carrier density decreases, the emission rapidly converges toward a relatively narrow band consistent with free exciton emission from the InP nanowire. The free excitons in these single InP nanowires exhibit recombination lifetimes closely approaching that measured in a high-quality epilayer, suggesting that in these InP nanowires, electrons and holes are relatively insensitive to surface states. This results in higher quantum efficiencies than other single-nanowire systems as well as significant state-filling and band gap renormalization, which is observed at high electron-hole carrier densities.
Keyword Chemistry, Multidisciplinary
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Semiconductor Nanowires
Surface
Gaas
Laser
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 18 Feb 2008, 15:42:07 EST