Exciton transfer and propagation in carbon nanotubes studied by near-field optical microscopy

Huihong Qian; Carsten Georgi; Neil Anderson; Alexander A. Green; Mark C. Hersam; Lukas Novotny; Achim Hartschuh

doi:10.1002/pssb.200879598

Exciton transfer and propagation in carbon nanotubes studied by near-field optical microscopy

Huihong Qian, Carsten Georgi, Neil Anderson, Alexander A. Green, Mark C. Hersam, Lukas Novotny, Achim Hartschuh

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

21 Scopus citations

Abstract

We studied transfer and propagation of excitons in single semiconducting carbon nanotubes using high resolution tip-enhanced near-field photoluminescence microscopy. Exciton energy transfer is found to occur from a larger band gap nanotube to a smaller band gap nanotube. Efficient transfer however is found to be limited to a few nanometers because of competing fast non-radiative relaxation and can be explained in terms of electromagnetic near-field coupling. Towards the end of a nanotube, photoluminescence decay is observed on a length scale of 50-90 nm which is attributed to exciton propagation followed by additional non-radiative relaxation at the nanotube end.

Original language	English (US)
Pages (from-to)	2243-2246
Number of pages	4
Journal	Physica Status Solidi (B) Basic Research
Volume	245
Issue number	10
DOIs	https://doi.org/10.1002/pssb.200879598
State	Published - Oct 2008
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Exciton transfer and propagation in carbon nanotubes studied by near-field optical microscopy",

abstract = "We studied transfer and propagation of excitons in single semiconducting carbon nanotubes using high resolution tip-enhanced near-field photoluminescence microscopy. Exciton energy transfer is found to occur from a larger band gap nanotube to a smaller band gap nanotube. Efficient transfer however is found to be limited to a few nanometers because of competing fast non-radiative relaxation and can be explained in terms of electromagnetic near-field coupling. Towards the end of a nanotube, photoluminescence decay is observed on a length scale of 50-90 nm which is attributed to exciton propagation followed by additional non-radiative relaxation at the nanotube end.",

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AU - Qian, Huihong

AU - Georgi, Carsten

AU - Anderson, Neil

AU - Green, Alexander A.

AU - Hersam, Mark C.

AU - Novotny, Lukas

AU - Hartschuh, Achim

PY - 2008/10

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AB - We studied transfer and propagation of excitons in single semiconducting carbon nanotubes using high resolution tip-enhanced near-field photoluminescence microscopy. Exciton energy transfer is found to occur from a larger band gap nanotube to a smaller band gap nanotube. Efficient transfer however is found to be limited to a few nanometers because of competing fast non-radiative relaxation and can be explained in terms of electromagnetic near-field coupling. Towards the end of a nanotube, photoluminescence decay is observed on a length scale of 50-90 nm which is attributed to exciton propagation followed by additional non-radiative relaxation at the nanotube end.

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Exciton transfer and propagation in carbon nanotubes studied by near-field optical microscopy

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