Journal
NANO LETTERS
Volume 11, Issue 4, Pages 1540-1545Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl104303c
Keywords
Graphene; pump probe; ultrafast optics; carrier dynamics; Auger scattering; saturable absorption
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Funding
- Academy of Finland [131165, 124133, 140387]
- RFBR [10-02-00792, 11-02-92121, 10-02-01194]
- Academy of Finland (AKA) [131165, 140387, 131165, 140387] Funding Source: Academy of Finland (AKA)
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We report the ultrafast light-induced absorbance change in CVD-grown rnultilayer grapheme. Using femtosecond pump probe measurements in 1100-1800 nm spectral range, we revealed broadband absorbance change when the probe photon energy was higher than that of the pump photon. The observed phenomenon is interpreted in terms of the Auger recombination and impact ionization playing a significant role in the dynamics of photoexcited carriers in graphene.
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