Antenna-enhanced optoelectronic probing of carbon nanotubes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 24877611.
- Also identified by DOI 10.1021/nl5006959.
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Abstract
We report on the first antenna-enhanced optoelectronic microscopy studies on nanoscale devices. By coupling the emission and excitation to a scanning optical antenna, we are able to locally enhance the electroluminescence and photocurrent along a carbon nanotube device. We show that the emission source of the electroluminescence can be pointlike with a spatial extension below 20 nm. Topographic and antenna-enhanced photocurrent measurements reveal that the emission takes place at the location of highest local electric field indicating that the mechanism behind the emission is the radiative decay of excitons created via impact excitation.
Medical subject headings
- Electrochemical Techniques
- Luminescent Measurements
- Microscopy, Confocal
- Nanotubes, Carbon