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Terahertz-polarizing effect based on geometric anisotropy of Ti3C2Tx MXene nanosheets

Journal Article · · Carbon
 [1];  [1];  [1];  [2];  [3];  [4];  [1];  [1]
  1. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
  2. Korea Univ., Seoul, (Korea, Republic of); Korea Institute of Science and Technology (KIST), Seoul (Korea, Republic of)
  3. Korea Institute of Science and Technology (KIST), Seoul (Korea, Republic of)
  4. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
Two-dimensional (2D) nanomaterials have garnered considerable attention due to their unique properties, such as thinness and excellent electronic properties. The inherent anisotropy of 2D nanomaterials, which is characterized by their high aspect ratio, can maximize the directional functionality to enhance the conductivity and utilization of edges. Here, we demonstrate how to utilize the edges of titanium carbide (Ti3C2Tx) MXene nanosheet to control the linear polarization in the terahertz (THz) frequency range. By a simple and unique vertical alignment exploiting the high surface charge and excellent colloidal dispersibility of MXene nanosheets, MXene nanosheets are vertically oriented along an applied AC electric field. The well-aligned edges justify the THz polarizing effect, revealing outstanding performances such as the broadband coverage in 0.2–1.5 THz and an exceptional extinction ratio reaching 20 dB. Furthermore, we vary the local orientation of the vertical MXene nanosheets by tailoring the applied electric field, enabling spatially controllable polarization capabilities. Our results can provide a generic tool for the utilization of 2D nanomaterials in diverse potential applications in optics and electronics.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2346090
Alternate ID(s):
OSTI ID: 2340169
Report Number(s):
LA-UR--23-26697
Journal Information:
Carbon, Journal Name: Carbon Vol. 225; ISSN 0008-6223
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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