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

Northwestern University

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20 Citations (Scopus)

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
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
Publication status	Published - Oct 1 2008

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Exciton transfer and propagation in carbon nanotubes studied by near-field optical microscopy. / Qian, Huihong; Georgi, Carsten; Anderson, Neil; Green, Alexander A.; Hersam, Mark C.; Novotny, Lukas; Hartschuh, Achim.

In: Physica Status Solidi (B) Basic Research, Vol. 245, No. 10, 01.10.2008, p. 2243-2246.

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

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

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