Femtosecond carrier dynamics and saturable absorption in graphene suspensions

By Sunil Kumar, M. Anija, N. Kamaraju, K. S. Vasu, K. Subrahmanyam, A. Sood, C. Rao. 2009

193 citations recorded by the source corpus.

Nonlinear optical properties and carrier relaxation dynamics in graphene, suspended in three different solvents, are investigated using femtosecond (80 fs pulses) Z-scan and degenerate pump-probe spectroscopy at 790 nm. The results demonstrate saturable absorption property of graphene with a nonlinear absorption coefficient, beta of (similar to 2-9) x 10(-8) cm/W. Two distinct time scales associated with the relaxation of photoexcited carriers, a fast one in the range of 130-330 fs (related to carrier-carrier scattering) followed by it slower one in 3.5-4.9 ps range (associated with carrier-phonon scattering) are observed. (C) 2009 American Institute of Physics.

Subfields: Biomedical Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/2faab21d85e464461303369590a3b29814170a08

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Biomedical Engineering

1. Shinji Yamashita
2. Q. Bao
3. K. Loh
4. Zhenhua Ni

In Materials Chemistry

1. Shinji Yamashita
2. Q. Bao
3. Zhenhua Ni
4. K. Loh
5. Zexiang Shen
6. Daiming Tang
7. L. Polavarapu
8. G. Soboń

Citations in the corpus

• A Tutorial on Nonlinear Photonic Applications of Carbon Nanotube and Graphene (2012, result): “behaviors have been reported in several literatures [17], [53],”
• Giant broadband nonlinear optical absorption response in dispersed graphene single sheets (2011, unknown): “A similar behaviour has also been found in multilayer graphene”
• Monolayer graphene as a saturable absorber in a mode-locked laser (2010, result): “The initial fast relaxation time τ1 of monolayer graphene is around 100 fs, which agrees with previous reports for graphene [3, 22–24].”