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 journalArticle

19 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 languageEnglish
Pages (from-to)2243-2246
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume245
Issue number10
DOIs
Publication statusPublished - Oct 2008

Fingerprint

Carbon Nanotubes
Excitons
Nanotubes
Optical microscopy
Carbon nanotubes
nanotubes
near fields
carbon nanotubes
excitons
microscopy
propagation
Photoluminescence
Energy gap
photoluminescence
Energy transfer
Microscopic examination
energy transfer
electromagnetism
LDS 751
high resolution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

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, 10.2008, p. 2243-2246.

Research output: Contribution to journalArticle

Qian, Huihong ; Georgi, Carsten ; Anderson, Neil ; Green, Alexander A. ; Hersam, Mark C ; Novotny, Lukas ; Hartschuh, Achim. / Exciton transfer and propagation in carbon nanotubes studied by near-field optical microscopy. In: Physica Status Solidi (B) Basic Research. 2008 ; Vol. 245, No. 10. pp. 2243-2246.
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