Dynamical Control over Terahertz Electromagnetic Interference Shielding with 2D Ti₃C₂Ty MXene by Ultrafast Optical Pulses
High electrical conductivity and strong absorption of electromagnetic radiation in the terahertz (THz) frequency range by metallic 2D MXene Ti3C2Ty make it a promising material for electromagnetic interference shielding, THz detectors, and transparent conducting electrodes. Here, we demonstrate that ultrafast optical pulses with wavelengths straddling the visible range (400 and 800 nm) induce transient broad-band THz transparency in the MXene that persists for nanoseconds. We demonstrate that optically induced transient THz transparency is independent of temperature from 95 to 290 K. This discovery opens new possibilities for development of switchable electromagnetic interference shielding materials and devices that can be rendered partially transparent on demand for transmitting THz signals, or for designing new THz devices such as sensitive optically gated detectors.
G. Li et al., "Dynamical Control over Terahertz Electromagnetic Interference Shielding with 2D Ti₃C₂Ty MXene by Ultrafast Optical Pulses," Nano Letters, vol. 20, no. 1, pp. 636 - 643, American Chemical Society (ACS), Dec 2019.
The definitive version is available at https://doi.org/10.1021/acs.nanolett.9b04404
Materials Science and Engineering
Center for High Performance Computing Research
Keywords and Phrases
MXene; Terahertz spectroscopy; Electromagnetic interference shielding; Ti3C2; THz; 2D materials
International Standard Serial Number (ISSN)
Article - Journal
© 2019 American Chemical Society (ACS), All rights reserved.
11 Dec 2019