Filters: Collection: "ir_uspace" Subject: "SWNT"
1 - 100 of 5
| Creator | Title | Description | Subject | Date | ||
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Vardeny, Zeev Valentine | Comment on "Large optical nonlinearity of semiconducting single-walled carbon nanotubes under resonant excitations" | In a recent Letter Maeda et al. studied the optical nonlinearities of single-walled carbon nanotubes (SWNT) films using both ??Z-scan?? and ??pump and probe?? (PP) techniques with ~100 fs time resolution [1]. They found that SWNTs have a large resonant third-order nonlinear optical susceptibili... | SWNT; Coherent artifact | 2006 |
| 2 |
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Vardeny, Zeev Valentine | Electroabsorption spectroscopy of single walled nanotubes | We have measured the electric field modulated absorption of a sample of single-walled nanotubes (SWNT) suspended in a solid polyvinyl alcohol matrix. The electroabsorption (EA) spectrum roughly follows the first derivative of the absorption with respect to photon energy, scales quadratically with t... | Electroabsorption spectroscopy; Single-walled nanotubes; SWNT | 2005 |
| 3 |
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Vardeny, Zeev Valentine | Exciton dynamics in single-walled nanotubes: transient photoinduced dichroism and polarized emission | Ultrafast relaxation of photoexcitations in semiconducting single-walled carbon nanotubes (S-NTs) were investigated using polarized pump-probe photomodulation (with 150 fs time resolution) and cw polarized photoluminescence (PL). Both annealed and unannealed thin NT films and D2O solutions of isola... | Exciton dynamics; Single-walled carbon nanotubes; SWNT; Transient photoinduced dichroism; Polarized emission; Ultrafast relaxation; Photoexcitations | 2005-03 |
| 4 |
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Liu, Feng | Impurity mediated absorption continuum in single-walled carbon nanotubes | The authors demonstrate that in single-walled carbon nanotubes, a weak impurity potential can lead to a strong above-gap absorption continuum. The total absorption is enhanced due to the intraband and indirect transitions, as well as plasmon excitations, which are forbidden in perfect nanotubes. Suc... | Carbon nanotubes; SWNT; Defects; Impurities; Above-gap; Absorption continuum | 2007 |
| 5 |
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Vardeny, Zeev Valentine | Ultrafast spectroscopy of excitons in single-walled carbon nanotubes | We studied the femtosecond dynamics of photoexcitations in films containing semiconducting and metallic single-walled carbon nanotubes (SWNTs), using various pump-probe wavelengths and intensities.We found that confined excitons and charge carriers with subpicosecond dynamics dominate the ultrafas... | Ultrafast spectroscopy; Excitons; Single-walled carbon nanotubes; SWNT | 2004-01 |
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