Ultrafast nonlinear photoresponse of single-wall carbon nanotubes: a broadband degenerate investigation. / Liu, Wenqing.

In: nanoscale, Vol. 8, 30.03.2016, p. 9304-9309.

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Ultrafast nonlinear photoresponse of single-wall carbon nanotubes: a broadband degenerate investigation. / Liu, Wenqing.

In: nanoscale, Vol. 8, 30.03.2016, p. 9304-9309.

Research output: Contribution to journalLetter

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@article{38d8654486524e06ac37adb76bc3bd16,
title = "Ultrafast nonlinear photoresponse of single-wall carbon nanotubes: a broadband degenerate investigation",
abstract = "Understanding of the fundamental photoresponse of carbon nanotubes has broad implications for various photonic and optoelectronic devices. Here, Z-scan and pump–probe spectroscopy performed across 600–2400 nm were combined to give a broadband ‘degenerate’ mapping of the nonlinear absorption properties of single-wall carbon nanotubes (SWNTs). In contrast to the views obtained from non-degenerate techniques, sizable saturable absorption is observed from the visible to the near-infrared range, including the spectral regions between semiconducting excitonic peaks and metallic tube transitions. In addition, the broadband mapping unambiguously reveals a photobleaching to photoinduced absorption transition feature within the first semiconducting excitonic band ∼2100 nm, quantitatively marking the long-wavelength cut-off for saturable absorption of the SWNTs investigated. Our findings present a much clearer physical picture of SWNTs’ nonlinear absorption characteristics, and help provide updated design guidelines for SWNT based nonlinear optical devices.",
author = "Wenqing Liu",
year = "2016",
month = "3",
day = "30",
doi = "10.1039/C6NR00652C",
language = "English",
volume = "8",
pages = "9304--9309",
journal = "nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",

}

RIS

TY - JOUR

T1 - Ultrafast nonlinear photoresponse of single-wall carbon nanotubes: a broadband degenerate investigation

AU - Liu, Wenqing

PY - 2016/3/30

Y1 - 2016/3/30

N2 - Understanding of the fundamental photoresponse of carbon nanotubes has broad implications for various photonic and optoelectronic devices. Here, Z-scan and pump–probe spectroscopy performed across 600–2400 nm were combined to give a broadband ‘degenerate’ mapping of the nonlinear absorption properties of single-wall carbon nanotubes (SWNTs). In contrast to the views obtained from non-degenerate techniques, sizable saturable absorption is observed from the visible to the near-infrared range, including the spectral regions between semiconducting excitonic peaks and metallic tube transitions. In addition, the broadband mapping unambiguously reveals a photobleaching to photoinduced absorption transition feature within the first semiconducting excitonic band ∼2100 nm, quantitatively marking the long-wavelength cut-off for saturable absorption of the SWNTs investigated. Our findings present a much clearer physical picture of SWNTs’ nonlinear absorption characteristics, and help provide updated design guidelines for SWNT based nonlinear optical devices.

AB - Understanding of the fundamental photoresponse of carbon nanotubes has broad implications for various photonic and optoelectronic devices. Here, Z-scan and pump–probe spectroscopy performed across 600–2400 nm were combined to give a broadband ‘degenerate’ mapping of the nonlinear absorption properties of single-wall carbon nanotubes (SWNTs). In contrast to the views obtained from non-degenerate techniques, sizable saturable absorption is observed from the visible to the near-infrared range, including the spectral regions between semiconducting excitonic peaks and metallic tube transitions. In addition, the broadband mapping unambiguously reveals a photobleaching to photoinduced absorption transition feature within the first semiconducting excitonic band ∼2100 nm, quantitatively marking the long-wavelength cut-off for saturable absorption of the SWNTs investigated. Our findings present a much clearer physical picture of SWNTs’ nonlinear absorption characteristics, and help provide updated design guidelines for SWNT based nonlinear optical devices.

U2 - 10.1039/C6NR00652C

DO - 10.1039/C6NR00652C

M3 - Letter

VL - 8

SP - 9304

EP - 9309

JO - nanoscale

JF - nanoscale

SN - 2040-3364

ER -