Unusually Large Franz-Keldysh Oscillations at Ultraviolet Wavelengths in Single-Walled Carbon Nanotubes

Author(s)
Ham, Moon-Ho; Kong, Byung-Seon; Kim, Woo-Jae; Jung, Hee-Tae; Strano, Michael S.
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Abstract
We report large electroabsorption susceptibilities in the ultraviolet region for single-walled carbon nanotubes (SWNT) supported on quartz that are approximately 10[superscript 3] larger than the highest values reported to date for any system. The oscillatory behavior is described using a convolution of Airy functions in photon energy ascribing the effect to Franz-Keldysh oscillations. The metallic and semiconducting SWNT composition is varied, and it is shown that the confinement energy correlates with the average band gap for semiconducting SWNT in the film. The large susceptibilities arise from a subpercolated network of metallic SWNT that enhances the local electric field.
Date issued
2009-01
URI
http://hdl.handle.net/1721.1/51998
Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Ham, Moon-Ho et al. “Unusually Large Franz-Keldysh Oscillations at Ultraviolet Wavelengths in Single-Walled Carbon Nanotubes.” Physical Review Letters 102.4 (2009): 047402. © 2009 The American Physical Society
Version: Final published version
ISSN
0031-9007
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