Broadband Nonlinear Photonics in Few‐Layer MXene Ti 3 C 2 T x (T = F, O, or OH)

Abstract Studies of the nonlinear optical phenomena that describe the light‐matter interactions in 2D crystalline materials have promoted a diverse range of photonic applications. MXene, as a recently developed new 2D material, has attracted considerable attention because of its graphene‐like but highly tunable and tailorable electronic/optical properties. In this study, we systematically characterize the nonlinear optical response of MXene Ti 3 C 2 T x nanosheets over the spectral range of 800 nm to 1800 nm. A large effective nonlinear absorption coefficient (β eff ∼‐10 −21 m 2 /V 2 ) due to saturable absorption is observed for all of the testing wavelengths. The contribution of saturable absorption is two…

• NN
  National Natural Science Foundation of China

  Awards: 61435010, 61575089
• SA
  Science and Technology Development Fund

  Award: 007/2017/A1