Optical phonon lifetimes in single-walled carbon nanotubes by time-resolved Raman scattering.
basic_science · Level V
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- Record sourced from PubMed, PMID 19367808.
- Also identified by DOI 10.1021/nl802447a.
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Abstract
The lifetimes of optical phonons (OPs) in single-walled carbon nanotubes are determined by time-resolved incoherent anti-Stokes Raman scattering using a subpicosecond pump-probe method. Lifetimes in semiconducting and metallic nanotubes at room temperature are similar, 1.2 and 0.9 ps, respectively. The OP lifetimes decrease with increasing temperature, approximately scaling as approximately 1/T, consistent with anharmonic processes being the dominant decay mechanism for both semiconducting and metallic nanotubes.