期刊
NANO LETTERS
卷 8, 期 12, 页码 4642-4647出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl802447a
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- U.S. Department of Energy, Division of Materials Sciences [DE-FG02-07ER46459]
- U.S. Department of Energy [DE-FG02-07ER46453, DE-FG02-07ER46471]
- National Science Foundation [DMR-0348585]
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 similar to 1/T, consistent with anharmonic processes being the dominant decay mechanism for both semiconducting and metallic nanotubes.
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