Emerging probing perspective of two-dimensional materials physics: terahertz emission spectroscopy

Yifei Wu; Yuqi Wang; Di Bao; Xiaonan Deng; Simian Zhang; Yu-chun Lin; Shengxian Ke; Jianing Liu; Yingjie Liu; Zeli Wang; Pingren Ham; Andrew Hanna; Jiaming Pan; Xinyue Hu; Zhengcao Li; Ji Zhou; Chen Wang

doi:10.1038/s41377-024-01486-2

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Emerging probing perspective of two-dimensional materials physics: terahertz emission spectroscopy

Reviews

- Emerging probing perspective of two-dimensional materials physics: terahertz emission spectroscopy
- Light: Science & Applications Vol. 13, Issue 7, Pages: 1278-1298(2024)
- Affiliations：
  
  1.State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, 100084 Beijing, China
  2.Beijing Advanced Innovation Center for Integrated Circuits, 100084 Beijing, China
- Author bio：
  
  Chen Wang (chenwang0101@tsinghua.edu.cn)
- Funds：
- DOI：10.1038/s41377-024-01486-2
  CLC：
- Published：31 July 2024，
  
  Published Online：29 June 2024，
  
  Received：16 September 2023，
  
  Revised：09 April 2024，
  
  Accepted：15 May 2024
- Accepted：
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Wu, Y. F. et al. Emerging probing perspective of two-dimensional materials physics: terahertz emission spectroscopy. Light: Science & Applications, 13, 1278-1298 (2024).
DOI：

Wu, Y. F. et al. Emerging probing perspective of two-dimensional materials physics: terahertz emission spectroscopy. Light: Science & Applications, 13, 1278-1298 (2024). DOI： 10.1038/s41377-024-01486-2.

摘要

Abstract

Terahertz (THz) emission spectroscopy (TES) has emerged as a highly effective and versatile technique for investigating the photoelectric properties of diverse materials and nonlinear physical processes in the past few decades. Concurrently

research on two-dimensional (2D) materials has experienced substantial growth due to their atomically thin structures

exceptional mechanical and optoelectronic properties

and the potential for applications in flexible electronics

sensing

and nanoelectronics. Specifically

these materials offer advantages such as tunable bandgap

high carrier mobility

wideband optical absorption

and relatively short carrier lifetime. By applying TES to investigate the 2D materials

their interfaces and heterostructures

rich information about the interplay among photons

charges

phonons and spins can be unfolded

which provides fundamental understanding for future applications. Thus it is timely to review the nonlinear processes underlying THz emission in 2D materials including optical rectification

photon-drag

high-order harmonic generation and spin-to-charge conversion

showcasing the rich diversity of the TES employed to unravel the complex nature of these materials. Typical applications based on THz emissions

such as THz lasers

ultrafast imaging and biosensors

are also discussed. Step further

we analyzed the unique advantages of spintronic terahertz emitters and the future technological advancements in the development of new THz generation mechanisms leading to advanced THz sources characterized by wide bandwidth

high power and integration

suitable for industrial and commercial applications. The continuous advancement and integration of TES with the study of 2D materials and heterostructures promise to revolutionize research in different areas

including basic materials physics

novel optoelectronic devices

and chips for post-Moore's era.

关键词

Keywords

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