Detail publikace

Revealing Nanoscale Confinement Effects on Hyperbolic Phonon Polaritons with an Electron Beam

KONEČNÁ, A. LI, J. EDGAR, J. H. DE ABAJO, G. HACHTEL, J.A.

Originální název

Revealing Nanoscale Confinement Effects on Hyperbolic Phonon Polaritons with an Electron Beam

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Hyperbolic phonon polaritons (HPhPs) in hexagonal boron nitride (hBN) enable the direct manipulation of mid-infrared light at nanometer scales, many orders of magnitude below the free-space light wavelength. High-resolution monochromated electron energy-loss spectroscopy (EELS) facilitates measurement of excitations with energies extending into the mid-infrared while maintaining nanoscale spatial resolution, making it ideal for detecting HPhPs. The electron beam is a precise source and probe of HPhPs, which allows the observation of nanoscale confinement in HPhP structures and directly extract hBN polariton dispersions for both modes in the bulk of the flake and modes along the edge. The measurements reveal technologically important nontrivial phenomena, such as localized polaritons induced by environmental heterogeneity, enhanced and suppressed excitation due to 2D interference, and strong modification of high-momenta excitations such as edge-confined polaritons by nanoscale heterogeneity on edge boundaries. The work opens exciting prospects for the design of real-world optical mid-infrared devices based on hyperbolic polaritons.

Klíčová slova

2D materials; hexagonal boron nitride; hyperbolic phonon polaritons; infrared spectroscopy; monochromated electron energy-loss spectroscopy; nanophotonics; optoelectronics

Autoři

KONEČNÁ, A.; LI, J.; EDGAR, J. H.; DE ABAJO, G.; HACHTEL, J.A.

Vydáno

28. 8. 2021

Nakladatel

WILEY-V C H VERLAG GMBH

Místo

WEINHEIM

ISSN

1613-6810

Periodikum

Small

Ročník

17

Číslo

39

Stát

Spolková republika Německo

Strany od

1

Strany do

9

Strany počet

9

URL

https://onlinelibrary.wiley.com/doi/10.1002/smll.202103404

BibTex

@article{BUT172666,
  author="KONEČNÁ, A. and LI, J. and EDGAR, J. H. and DE ABAJO, G. and HACHTEL, J.A.",
  title="Revealing Nanoscale Confinement Effects on Hyperbolic Phonon Polaritons with an Electron Beam",
  journal="Small",
  year="2021",
  volume="17",
  number="39",
  pages="1--9",
  doi="10.1002/smll.202103404",
  issn="1613-6810",
  url="https://onlinelibrary.wiley.com/doi/10.1002/smll.202103404"
}