Abstract
Using pump-probe techniques, we study the ultrafast relaxation dynamics of photoexcited carriers in graphene. We find an initial fast relaxation transient (70-120 fs), followed by a slower relaxation process (0.4-1.7 ps). We relate the measured time scales to carrier-carrier and carrier- phonon intraband and interband scattering processes and also to crystal disorder in the material.
© 2008 Optical Society of America
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