Revealing Nanoscale Confinement Effects on Hyperbolic Phonon Polaritons with an Electron Beam
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F21%3APU141706" target="_blank" >RIV/00216305:26620/21:PU141706 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/smll.202103404" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/smll.202103404</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/smll.202103404" target="_blank" >10.1002/smll.202103404</a>
Alternative languages
Result language
angličtina
Original language name
Revealing Nanoscale Confinement Effects on Hyperbolic Phonon Polaritons with an Electron Beam
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Small
ISSN
1613-6810
e-ISSN
1613-6829
Volume of the periodical
17
Issue of the periodical within the volume
39
Country of publishing house
DE - GERMANY
Number of pages
9
Pages from-to
1-9
UT code for WoS article
000690674200001
EID of the result in the Scopus database
2-s2.0-85113702265