Transient Absorption Kinetics Associated with Higher Exciton States in Semiconducting Single-Walled Carbon Nanotubes: Relaxation of Excitons and Phonons
| Autor: | Takeshi Koyama, Arao Nakamura, Yasumitsu Miyata, Hideo Kishida, Hisanori Shinohara, Shohei Yoshimitsu |
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| Rok vydání: | 2013 |
| Předmět: |
education.field_of_study
Materials science Auger effect Condensed matter physics Exciton Relaxation (NMR) Population Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Molecular physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Condensed Matter::Materials Science symbols.namesake General Energy Ultrafast laser spectroscopy symbols Physical and Theoretical Chemistry Spectroscopy education Absorption (electromagnetic radiation) Biexciton |
| Zdroj: | The Journal of Physical Chemistry C. 117:20289-20299 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp406650t |
| Popis: | We investigate the transient absorption kinetics due to excitons associated with the first and higher transition states in semiconducting single-walled carbon nanotubes at high excitation densities by means of femtosecond pump–probe spectroscopy. The time evolutions of absorption changes associated with the first, second, and third excitonic transition bands exhibit similar decay behavior; the decay is much longer than the exciton population decay observed by time-resolved luminescence measurements. From spectral shape analysis of the transient absorption spectra, it is found that the absorption change in the short time regime ( |
| Databáze: | OpenAIRE |
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