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Ti3C2Tx MXene Quantum Dots with Enhanced Stability for Ultrafast Photonics
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-11-23 , DOI: 10.1021/acsanm.0c02369 Fumei Yang 1 , Yanqi Ge 1, 2 , Teng Yin 1 , Jia Guo 1 , Feng Zhang 1 , Xian Tang 1 , Meng Qiu 1 , Weiyuan Liang 1 , Ning Xu 1 , Cong Wang 1 , Yufeng Song 1 , Shixiang Xu 1 , Sanshui Xiao 2
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-11-23 , DOI: 10.1021/acsanm.0c02369 Fumei Yang 1 , Yanqi Ge 1, 2 , Teng Yin 1 , Jia Guo 1 , Feng Zhang 1 , Xian Tang 1 , Meng Qiu 1 , Weiyuan Liang 1 , Ning Xu 1 , Cong Wang 1 , Yufeng Song 1 , Shixiang Xu 1 , Sanshui Xiao 2
Affiliation
MXenes, as an emerging group of two-dimensional materials, have attracted significant interest for diverse photoelectric applications by virtue of their tunable terminated surface, excellent electrical conductivity, and strong nonlinear optical response. They are usually synthesized via strategies involving hydrofluoric acid, which may result in oxygenic and hydrophilic termination groups on the MXene surface and thus decrease their stability in air. Herein, a mild synthesis method based on electrochemical exfoliation is proposed to prepare Ti3C2Tx MXene quantum dots (QDs), which are highly fluorinated to enhance stability. The open-aperture Z-scan system was employed to measure the nonlinear transmittance of the MXene QDs and proves their broadband saturable absorption from 540 to 1550 nm. By integrating the MXene QD saturable absorber into an ytterbium-doped fiber laser, a set of highly stable 357 ps mode-locked pulses centered at 1069.17 nm was achieved under a low threshold power of 54 mW. In addition, tunable mode-locked optical spectra could be observed in the cavity when switching the polarization state. This work provides an environmentally friendly approach to synthesize stable MXene QDs and opens an avenue for the realization of low-threshold and tunable photonics applications based on MXene QDs.
中文翻译:
具有增强稳定性的Ti 3 C 2 T x MXene量子点,用于超快光子学
作为一种新兴的二维材料,MXene由于其可调的端接表面,出色的导电性和强大的非线性光学响应,已引起了广泛的兴趣,广泛应用于各种光电应用。它们通常是通过涉及氢氟酸的策略来合成的,氢氟酸可能会导致MXene表面上的氧和亲水端基基团,从而降低其在空气中的稳定性。本文提出了一种基于电化学剥离的温和合成方法制备Ti 3 C 2 T xMXene量子点(QD),高度氟化以增强稳定性。使用开孔Z扫描系统测量MXene QD的非线性透射率,并证明了它们在540至1550 nm的宽带饱和吸收率。通过将MXene QD可饱和吸收体集成到掺fiber光纤激光器中,在54 mW的低阈值功率下,获得了一组以1069.17 nm为中心的高度稳定的357 ps锁模脉冲。另外,当切换偏振态时,可在腔中观察到可调锁模光谱。这项工作为合成稳定的MXene QD提供了一种环境友好的方法,并为实现基于MXene QD的低阈值和可调光子学应用提供了途径。
更新日期:2020-12-24
中文翻译:
具有增强稳定性的Ti 3 C 2 T x MXene量子点,用于超快光子学
作为一种新兴的二维材料,MXene由于其可调的端接表面,出色的导电性和强大的非线性光学响应,已引起了广泛的兴趣,广泛应用于各种光电应用。它们通常是通过涉及氢氟酸的策略来合成的,氢氟酸可能会导致MXene表面上的氧和亲水端基基团,从而降低其在空气中的稳定性。本文提出了一种基于电化学剥离的温和合成方法制备Ti 3 C 2 T xMXene量子点(QD),高度氟化以增强稳定性。使用开孔Z扫描系统测量MXene QD的非线性透射率,并证明了它们在540至1550 nm的宽带饱和吸收率。通过将MXene QD可饱和吸收体集成到掺fiber光纤激光器中,在54 mW的低阈值功率下,获得了一组以1069.17 nm为中心的高度稳定的357 ps锁模脉冲。另外,当切换偏振态时,可在腔中观察到可调锁模光谱。这项工作为合成稳定的MXene QD提供了一种环境友好的方法,并为实现基于MXene QD的低阈值和可调光子学应用提供了途径。