Atomic‐Layer Graphene as a Saturable Absorber for Ultrafast Pulsed Lasers

  title={Atomic‐Layer Graphene as a Saturable Absorber for Ultrafast Pulsed Lasers},
  author={Qiaoliang Bao and Han Zhang and Yu Wang and Zhenhua Ni and Yongli Yan and Ze Xiang Shen and Kian Ping Loh and Dingyan Tang},
  journal={Advanced Functional Materials},
The optical conductance of monolayer graphene is defined solely by the fine structure constant, α = $e^2 /\hbar c$ (where e is the electron charge, $\hbar $ is Dirac's constant and c is the speed of light). The absorbance has been predicted to be independent of frequency. In principle, the interband optical absorption in zero‐gap graphene could be saturated readily under strong excitation due to Pauli blocking. Here, use of atomic layer graphene as saturable absorber in a mode‐locked fiber… 

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