首页    期刊浏览 2025年07月07日 星期一
登录注册

文章基本信息

  • 标题:Substrate-mediated hyperbolic phonon polaritons in MoO3
  • 本地全文:下载
  • 作者:Jeffrey J. Schwartz ; Son T. Le ; Sergiy Krylyuk
  • 期刊名称:Nanophotonics
  • 印刷版ISSN:2192-8606
  • 电子版ISSN:2192-8614
  • 出版年度:2021
  • 卷号:10
  • 期号:5
  • 页码:1517-1527
  • DOI:10.1515/nanoph-2020-0640
  • 出版社:Walter de Gruyter GmbH
  • 摘要:Hyperbolic phonon polaritons (HPhPs) are hybrid excitations of light and coherent lattice vibrations that exist in strongly optically anisotropic media, including two-dimensional materials (e.g., MoO 3 ). These polaritons propagate through the material’s volume with long lifetimes, enabling novel mid-infrared nanophotonic applications by compressing light to sub-diffractional dimensions. Here, the dispersion relations and HPhP lifetimes (up to ≈12 ps) in single-crystalline α-MoO 3 are determined by Fourier analysis of real-space, nanoscale-resolution polariton images obtained with the photothermal induced resonance (PTIR) technique. Measurements of MoO 3 crystals deposited on periodic gratings show longer HPhPs propagation lengths and lifetimes (≈2×), and lower optical compressions, in suspended regions compared with regions in direct contact with the substrate. Additionally, PTIR data reveal MoO 3 subsurface defects, which have a negligible effect on HPhP propagation, as well as polymeric contaminants localized under parts of the MoO 3 crystals, which are derived from sample preparation. This work highlights the ability to engineer substrate-defined nanophotonic structures from layered anisotropic materials.
  • 关键词:2D materials; hyperbolic materials; phonon polaritons; photothermal induced resonance; subwavelength optical confinement.
国家哲学社会科学文献中心版权所有