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Measurement of a reaction-diffusion crossover in exciton-exciton recombination inside carbon nanotubes using femtosecond optical absorption
- Publication Year :
- 2013
-
Abstract
- Exciton-exciton recombination in isolated semiconducting single-walled carbon nanotubes was studied using femtosecond transient absorption. Under sufficient excitation to saturate the optical absorption, we observed an abrupt transition between reaction- and diffusion- limited kinetics, arising from reactions between incoherent localized excitons with a finite probability of ~ 0.2 per encounter. This represents the first experimental observation of a crossover between classical and critical kinetics in a 1D coalescing random walk, which is a paradigm for the study of non- equilibrium systems.<br />Accepted for Physical Review Letters. Title changed, and "exciton fusion" replaced by "exciton-exciton recombination". Present address of Prof Tom Brown added. 12 pages plus 3 figures
- Subjects :
- Materials science
Exciton
Kinetics
FOS: Physical sciences
General Physics and Astronomy
02 engineering and technology
Carbon nanotube
7. Clean energy
01 natural sciences
law.invention
Condensed Matter::Materials Science
law
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
Ultrafast laser spectroscopy
Reaction–diffusion system
010306 general physics
Absorption (electromagnetic radiation)
Condensed Matter - Statistical Mechanics
Statistical Mechanics (cond-mat.stat-mech)
Condensed Matter - Mesoscale and Nanoscale Physics
021001 nanoscience & nanotechnology
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
3. Good health
Femtosecond
Atomic physics
0210 nano-technology
Excitation
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....27894773eb1f9fb8751c35cd9ef4a9d4