Au/MXene based ultrafast all-optical switching

doi:10.1007/s11467-022-1248-0

Front. Phys.

2023, Vol. 18

Issue (3) : 33301 https://doi.org/10.1007/s11467-022-1248-0

RESEARCH ARTICLE

Au/MXene based ultrafast all-optical switching

Yule Zhang¹, Feng Zhang¹, Bowen Du¹, Hualong Chen¹, S. Wageh², Omar A. Al-Hartomy², Abdullah G. Al-Sehemi³, Bin Zhang¹(

), Han Zhang¹(

)

¹. International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics and Translational Medicine, The First Affiliated Hospital (Shenzhen Second People’s Hospital), College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
². Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
³. Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Ab-ha, 61413, Saudi Arabia

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Abstract

All-optical switches have arisen great attention due to their ultrafast speed as compared with electric switches. However, the excellent optical properties and strong interaction of two-dimensional (2D) material MXene show great potentials in next-generation all-optical switching. As a solution, we propose all-optical switching used Au/MXene with switching full width at half maximum (FWHM) operating at 290 fs. Compared with pure MXene, the Au/MXene behaves outstanding performances due to local surface plasmon resonance (LSPR), including broadband differential transmission, strong near-infrared on/off ratio enhancement. Remarkably, this study enhances understanding of Au/MXene based ultrafast all-optical switching red-shifted about 34 nm in comparison to MXene, validating all optical properties of Au/MXene opening the way to the implementation of optical interconnection and optical switching.

Keywords Au/MXene ultrafast all-optical switching Au/MXene carrier lifetime

Corresponding Author(s): Bin Zhang,Han Zhang

Issue Date: 11 January 2023

Cite this article:

Yule Zhang,Feng Zhang,Bowen Du, et al. Au/MXene based ultrafast all-optical switching[J]. Front. Phys. , 2023, 18(3): 33301.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-022-1248-0
https://academic.hep.com.cn/fop/EN/Y2023/V18/I3/33301

Fig.1 Morphology characterizations of straticulate Au/MXene (a) Transmission Electron Microscope (TEM) images of scale bar: 20 nm and 5 nm. (c?e) Au, Ti, and C EDS-mappings in (b) HAADF EDX-mapping.

Fig.2 (a) XANES and (b) EXAFS results of Au foil, AuCl₃ standards and Au/MXene. (c, d) Wavelet transform of Au L₃ edge EXAFS in Au/MXene. (e) DLS spectrum of Au/MXene. (f) UV-vis absorption spectra of Au/MXene and MXene.

Fig.3 Schematic representation of structure of the optical switch. (a) Photoexcited Au/MXene by pump light and probe light. (b) Electron was excited from ground state to excited state.

Fig.4 MXene and Au/MXene TA spectrums. (a) Selective pump-probe delay times of MXene film on quartz in the probe range (475?780 nm and 800?1300 nm) by 420 nm excitation. (b) MXene 2D TA spectrum map with excitation intensity of 0.5 J/pulse. (c) Au/MXene film on quartz in the same probe. (d) 2D TA spectrum map of Au/MXene in the same pulse energy.

Fig.5 MXene and Au/MXene carrier liftimes. (a) Ultrafast dynamics observed at 680 and 690 nm. (b) At the probe wavelength of 823 nm and 857 nm.

Fig.6 Ultrafast dynamics at the probe wavelength of 1000 nm.

Tab.1 Carrier delay time at probe wavelength of 1000 nm.

Fig.7 A typical pump-probe experimental set-up.

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