Investigation of Nonlinear Optical Modulation Characteristics of MXene VCrC for Pulsed Lasers

Abstract

We report the surface morphology and the nonlinear absorption characteristics of MXene VCrC nanosheets prepared by the liquid-phase exfoliation method. The self-made MXene VCrC was applied as a saturable absorber in the Tm:YAP laser experiments, performing excellent Q-switching optical modulation characteristics in infrared range. With this absorber, a stable passively Q-switched 2 μm laser was achieved. Under an incident pump power of 3.52 W, a maximum output power of 280 mW was obtained with a T = 3% output coupler at a repetition frequency of 49 kHz. The corresponding pulse energy and peak power were 5.7 μJ and 6.6 W, respectively. The shortest pulse duration was 658 ns at the repetition rate of 63 kHz with a T = 1% output coupler.

Green Synthesis and Biosafety Assessment of MXene

“…The summary of the as-reported MXene with various compositions is shown in Figure 2. [11,[34][35][36][37][38][39][40] To date, the most widely used MXene in biomedicine are Ti 3 C 2 , Ti 2 C, Ta 4 C 3 , Mo 2 C, and Nb 2 C groups. For example, Ti 3 C 2 , and Ti 2 C-based biomaterials have been used in the field of tissue regeneration, [41,42] and Ta 4 C 3 , Mo 2 C, and Nb 2 C have been explored in the field of cancer therapy.…”

Quasi-2D Mn3Si2Te6 Nanosheet for Ultrafast Photonics

“…The passive Q-switching technique is one of the most effective methods to generate pulsed lasers [ 6 , 7 , 8 , 9 ]. By applying the Q-switched mechanism, short pulses can be achieved with durations of microseconds (μs) or nanoseconds (ns) and a low repetition rate of kilohertz (kHz) [ 10 , 11 ]. In this technique, the saturable absorbers (SAs) are essential components of fiber laser systems for modulating intracavity loss and generating short pulses [ 12 ].…”

Operation of a passively Q‐switched Tm:YAP laser with Ta2NiS5 as a saturable absorber

“…Even more research interest has been generated by the use of two-dimensional (2D) materials as SAs. To date, several 2D materials exhibiting excellent photoelectric performance have been revealed in PQS lasers operating in the 2-μm wavelength range, including graphene, 9 black phosphorus (BP), 10 transitional metal dichalcogenides, [11][12][13][14] topological insulators, [15][16][17] semiconductor materials, 18 MXenes, 19 and heterostructures. 20 Some oxides also have very good photoelectric properties, such as chromium oxide.…”