Third-order optical nonlinearities of Nb₄C₃ MXene and its application as an ultra-broadband mode-locker

Abstract

The broadband nonlinear optical properties of Nb4C3 MXene were investigated using Z-scan techniques. Using Nb4C3 MXene, a single saturable absorber operating at both 1560 and 1930 nm was successfully fabricated for fiber laser mode-locking.

Two-Dimensional Nb4AlC3 (MAX) and Nb4C3 (MXene): Excellent Optical Limiting Materials with Oppositely Applicated Waveband

“…Two-dimensional nanomaterials such as graphene, carbon allotropes, and MXenes have attracted increasing attention in the fields of energy storage, catalysis, sensing, and optics − due to their excellent electronic properties and unusual physicochemical characteristics. − MXenes are a fast-growing family of 2D materials and are transition metal carbides or nitrides with the general formula M n +1 X n T x ( n = 1–3), , where M is a transition metal such as Ti, Nb, V, etc., X is a C or N element, and T x denotes surface terminations such as OH, O, F, and/or Cl, which are bound to the external M layer. , The MAX phases, which are predecessors to MXenes, are layered ternary carbides or nitrides with ceramic and metallic properties. − The general formula is M n +1 AX n ( n = 1–3), where A primarily consists of group IIIA or IVA elements (e.g., the Al element). − MXenes were obtained by selectively etching the A-layer atoms of the MAX phases . The discovery of MXenes has reignited interest in the investigation of MAX phases.…”