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 Dingyuan Tang},
  journal={Advanced Functional Materials},
The optical conductance of monolayer graphene is defined solely by the fine structure constant, α =  (where e is the electron charge, 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 laser for the generation of… Expand

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