Abstract
Using pump-probe characterization, band gap photobleaching has been observed from semiconducting single-walled carbon nanotubes (SWNTs) isolated in aqueous suspensions in an effort to evaluate SWNTs as a near-infrared optical material. The measured photobleaching was optimized for co-polarization of pump and probe lasers in resonance with the second and first van Hove transitions, respectively. A saturation of photobleaching intensity was observed for large pump intensities greater than ∼1 kW cm-2 and for probe intensities approaching ∼500 W cm-2. The observed photobleaching is attributed to the relaxation of excited electron-hole pairs to the band edges, resulting in decreased absorption and increased stimulated emission.
| Original language | English |
|---|---|
| Pages (from-to) | 1549-1554 |
| Number of pages | 6 |
| Journal | Nano letters |
| Volume | 3 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 1 2003 |
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering
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Cite this
Arnold, M. S., Sharping, J. E., Stupp, S. I., Kumar, P., & Hersam, M. C. (2003). Band Gap Photobleaching in Isolated Single-Walled Carbon Nanotubes. Nano letters, 3(11), 1549-1554. https://doi.org/10.1021/nl034726f