Wednesday, October 22, 2008, 10:00 am — Bldg. 735 - Conf Rm B
While single-walled carbon nanotubes (SWNTs) have shown tremendous potential for electronic and energy applications, a comprehensive understanding of their electronic structure is still lacking. One crucial limitation has been the availability of broadband optical data on structurally characterized SWNTs. In order to address this challenge, we have developed rapid, broadband, and high-resolution spectroscopic techniques for studying both the visible and infrared electronic states on an individual SWNT. We have accomplished this using a process which combines observation of resonant enhancement in the spectra of scattered supercontinuum laser light with an infrared Fourier transform photoconductivity methodology. I will present our determination of the optical response over the range of 0.3 to 2.7 eV from a set of SWNTs and examine the scaling of the optical features as a function of diameter and subband index.
Hosted by: Chuck Black
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