Ultrafast spectroscopy of midinfrared internal exciton transitions in separated single-walled carbon nanotubes

Jigang Wang; Matt W. Graham; Yingzhong Ma; Graham R. Fleming; Robert A. Kaindl

doi:10.1103/PhysRevLett.104.177401

Ultrafast spectroscopy of midinfrared internal exciton transitions in separated single-walled carbon nanotubes

Jigang Wang, Matt W. Graham, Yingzhong Ma, Graham R. Fleming, Robert A. Kaindl

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

We report a femtosecond midinfrared study of the broadband low-energy response of individually separated (6,5) and (7,5) single-walled carbon nanotubes. Strong photoinduced absorption is observed around 200 meV, whose transition energy, oscillator strength, resonant chirality enhancement, and dynamics manifest the observation of quasi-one-dimensional intraexcitonic transitions. A model of the nanotube 1s-2p cross section agrees well with the signal amplitudes. Our study further reveals saturation of the photoinduced absorption with increasing phase-space filling of the correlated e-h pairs.

Original language	English (US)
Article number	177401
Journal	Physical Review Letters
Volume	104
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevLett.104.177401
State	Published - Apr 26 2010
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.104.177401

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abstract = "We report a femtosecond midinfrared study of the broadband low-energy response of individually separated (6,5) and (7,5) single-walled carbon nanotubes. Strong photoinduced absorption is observed around 200 meV, whose transition energy, oscillator strength, resonant chirality enhancement, and dynamics manifest the observation of quasi-one-dimensional intraexcitonic transitions. A model of the nanotube 1s-2p cross section agrees well with the signal amplitudes. Our study further reveals saturation of the photoinduced absorption with increasing phase-space filling of the correlated e-h pairs.",

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AU - Graham, Matt W.

AU - Ma, Yingzhong

AU - Fleming, Graham R.

AU - Kaindl, Robert A.

PY - 2010/4/26

Y1 - 2010/4/26

N2 - We report a femtosecond midinfrared study of the broadband low-energy response of individually separated (6,5) and (7,5) single-walled carbon nanotubes. Strong photoinduced absorption is observed around 200 meV, whose transition energy, oscillator strength, resonant chirality enhancement, and dynamics manifest the observation of quasi-one-dimensional intraexcitonic transitions. A model of the nanotube 1s-2p cross section agrees well with the signal amplitudes. Our study further reveals saturation of the photoinduced absorption with increasing phase-space filling of the correlated e-h pairs.

AB - We report a femtosecond midinfrared study of the broadband low-energy response of individually separated (6,5) and (7,5) single-walled carbon nanotubes. Strong photoinduced absorption is observed around 200 meV, whose transition energy, oscillator strength, resonant chirality enhancement, and dynamics manifest the observation of quasi-one-dimensional intraexcitonic transitions. A model of the nanotube 1s-2p cross section agrees well with the signal amplitudes. Our study further reveals saturation of the photoinduced absorption with increasing phase-space filling of the correlated e-h pairs.

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Ultrafast spectroscopy of midinfrared internal exciton transitions in separated single-walled carbon nanotubes

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