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 | |
| Publication status | Published - Oct 2008 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
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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, 10.2008, p. 2243-2246.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Exciton transfer and propagation in carbon nanotubes studied by near-field optical microscopy
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
Y1 - 2008/10
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=54949147923&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=54949147923&partnerID=8YFLogxK
U2 - 10.1002/pssb.200879598
DO - 10.1002/pssb.200879598
M3 - Article
AN - SCOPUS:54949147923
VL - 245
SP - 2243
EP - 2246
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
IS - 10
ER -