Terahertz Dirac Hyperbolic Metamaterial

Hyperbolic metamaterials (HMMs) are engineered materials with a hyperbolic isofrequency surface, enabling a range of interesting phenomena and applications including negative refraction, enhanced sensing, and subdiffraction imaging, focusing, and waveguiding. Existing HMMs primarily work in the visible and infrared spectral range due to the inherent properties of their constituent materials. Here, we demonstrate a THz-range Dirac HMM using topological insulators as the building blocks. We find that the structure houses up to three high-wavevector volume plasmon polariton (VPP) modes, consistent with transfer matrix modeling and effective medium theory calculations. The VPPs have mode indices greater than 100, significantly larger than observed for VPP modes in HMMs made from metals or doped semiconductors while maintaining comparable quality factors. We attribute these properties to the two-dimensional Dirac nature of the electrons occupying the topological insulator surface states. Because these are van der Waals materials, these structures can be grown at a wafer-scale on a variety of substrates, allowing them to be integrated with existing THz structures and enabling next-generation THz optical devices.

Files

Metadata

Work Title Terahertz Dirac Hyperbolic Metamaterial
Access
Open Access
Creators
  1. Zhengtianye Wang
  2. Saadia Nasir
  3. Sathwik Bharadwaj
  4. Yongchen Liu
  5. Sivakumar Vishnuvardhan Mambakkam
  6. Mingyu Yu
  7. Stephanie Law
License CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
Work Type Article
Publisher
  1. ACS Photonics
Publication Date 2024
Publisher Identifier (DOI)
  1. 10.1021/acsphotonics.4c01004
Deposited November 25, 2024

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created
  • Updated
  • Updated
  • Updated Publisher, Publisher Identifier (DOI), Description, and 1 more Show Changes
    Publisher
    • ACS Photonics
    Publisher Identifier (DOI)
    • 10.1021/acsphotonics.4c01004
    Description
    • Hyperbolic metamaterials (HMMs) are engineered materials with a hyperbolic isofrequency surface, enabling a range of interesting phenomena and applications including negative refraction, enhanced sensing, and subdiffraction imaging, focusing, and waveguiding. Existing HMMs primarily work in the visible and infrared spectral range due to the inherent properties of their constituent materials. Here, we demonstrate a THz-range Dirac HMM using topological insulators as the building blocks. We find that the structure houses up to three high-wavevector volume plasmon polariton (VPP) modes, consistent with transfer matrix modeling and effective medium theory calculations. The VPPs have mode indices greater than 100, significantly larger than observed for VPP modes in HMMs made from metals or doped semiconductors while maintaining comparable quality factors. We attribute these properties to the two-dimensional Dirac nature of the electrons occupying the topological insulator surface states. Because these are van der Waals materials, these structures can be grown at a wafer-scale on a variety of substrates, allowing them to be integrated with existing THz structures and enabling next-generation THz optical devices.
    Publication Date
    • 2024
  • Added Creator Zhengtianye Wang
  • Added Creator Saadia Nasir
  • Added Creator Sathwik Bharadwaj
  • Added Creator Yongchen Liu
  • Added Creator Sivakumar Vishnuvardhan Mambakkam
  • Added Creator Mingyu Yu
  • Added Creator Stephanie Law
  • Added Supplement_revised.docx
  • Added Main_revised.docx
  • Updated License Show Changes
    License
    • https://creativecommons.org/licenses/by-nc-nd/4.0/
  • Published
  • Updated