TY - JOUR
T1 - Broadband nonlinear photonics in few-layer MXene Ti3C2Tx (T = F, O, or OH)
AU - Jiang, Xiantao
AU - Liu, Shunxiang
AU - Liang, Weiyuan
AU - Luo, Shaojuan
AU - He, Zhiliang
AU - Ge, Yanqi
AU - Wang, Huide
AU - Cao, Rui
AU - Zhang, Feng
AU - Wen, Qiao
AU - Li, Jianqing
AU - Bao, Qiaoliang
AU - Fan, Dianyuan
AU - Zhang, Han
PY - 2018/2/1
Y1 - 2018/2/1
N2 - 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 Ti3C2Tx nanosheets over the spectral range of 800 nm to 1800 nm. A large effective nonlinear absorption coefficient (βeff∼-10−21 m2/V2) due to saturable absorption is observed for all of the testing wavelengths. The contribution of saturable absorption is two orders of magnitude higher than other lossy nonlinear absorption processes, and the amplitude of βeff strongly depends on the light bleaching level. A negative nonlinear refractive index (n2∼-10−20 m2/W) with value comparable to that of the intensively studied graphene was demonstrated for the first time. These results demonstrate the efficient broadband light signal manipulating capabilities of Ti3C2Tx, which is only one member of the large MXene family. The capability of an efficient broadband optical switch is strongly confirmed using Ti3C2Tx as saturable absorbers for mode-locking operation at 1066 nm and 1555 nm, respectively. A highly stable femtosecond laser with pulse duration as short as 159 fs in the telecommunication window is readily obtained. Considering the diversity of the MXene family, this study may open a new avenue to advanced photonic devices.
AB - 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 Ti3C2Tx nanosheets over the spectral range of 800 nm to 1800 nm. A large effective nonlinear absorption coefficient (βeff∼-10−21 m2/V2) due to saturable absorption is observed for all of the testing wavelengths. The contribution of saturable absorption is two orders of magnitude higher than other lossy nonlinear absorption processes, and the amplitude of βeff strongly depends on the light bleaching level. A negative nonlinear refractive index (n2∼-10−20 m2/W) with value comparable to that of the intensively studied graphene was demonstrated for the first time. These results demonstrate the efficient broadband light signal manipulating capabilities of Ti3C2Tx, which is only one member of the large MXene family. The capability of an efficient broadband optical switch is strongly confirmed using Ti3C2Tx as saturable absorbers for mode-locking operation at 1066 nm and 1555 nm, respectively. A highly stable femtosecond laser with pulse duration as short as 159 fs in the telecommunication window is readily obtained. Considering the diversity of the MXene family, this study may open a new avenue to advanced photonic devices.
KW - large Kerr coefficient
KW - mode-locked femtosecond lasers
KW - MXene TiCT
KW - nanomaterials
KW - nonlinear optical properties
UR - http://www.scopus.com/inward/record.url?scp=85042157174&partnerID=8YFLogxK
U2 - 10.1002/lpor.201700229
DO - 10.1002/lpor.201700229
M3 - Article
AN - SCOPUS:85042157174
SN - 1863-8880
VL - 12
JO - Laser & Photonics Reviews
JF - Laser & Photonics Reviews
IS - 2
M1 - 1700229
ER -