Giant two‐photon absorption in monolayer MoS2

  title={Giant two‐photon absorption in monolayer MoS2},
  author={Yuanxin Li and Ningning Dong and Saifeng Zhang and Xiaoyan Zhang and Yanyan Feng and Kangpeng Wang and Long Zhang and Jun Wang},
  journal={Laser \& Photonics Reviews},
Strong two‐photon absorption (TPA) in monolayer MoS2 is demonstrated in contrast to saturable absorption (SA) in multilayer MoS2 under the excitation of femtosecond laser pulses in the near‐infrared region. MoS2 in the forms of monolayer single crystal and multilayer triangular islands are grown on either quartz or SiO2/Si by employing the seeding method through chemical vapor deposition. The nonlinear transmission measurements reveal that monolayer MoS2 possesses a nonsaturation TPA… 

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