Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/218392
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Infrared permittivity of the biaxial van der Waals semiconductor α‐MoO3 from near‐ and far‐field correlative studies

AuthorsÁlvarez-Pérez, Gonzalo; Folland, Thomas G.; Errea, Ion; Taboada-Gutiérrez, Javier; Duan, Jiahua; Martín-Sánchez, Javier; Tresguerres-Mata, Ana I. F.; Matson, Joseph R.; Bylinkin, Andrei; He, Mingze; Ma, Weiliang; Bao, Qiaoliang; Martín, José Ignacio CSIC ORCID; Caldwell, Joshua D.; Nikitin, Alexey Y.; Alonso-González, Pablo CSIC ORCID
Issue Date2020
PublisherWiley-VCH
CitationAdvanced Materials 32(29): 1908176 (2020)
AbstractThe biaxial van der Waals semiconductor α‐phase molybdenum trioxide (α‐MoO3) has recently received significant attention due to its ability to support highly anisotropic phonon polaritons (PhPs)—infrared (IR) light coupled to lattice vibrations—offering an unprecedented platform for controlling the flow of energy at the nanoscale. However, to fully exploit the extraordinary IR response of this material, an accurate dielectric function is required. Here, the accurate IR dielectric function of α‐MoO3 is reported by modeling far‐field polarized IR reflectance spectra acquired on a single thick flake of this material. Unique to this work, the far‐field model is refined by contrasting the experimental dispersion and damping of PhPs, revealed by polariton interferometry using scattering‐type scanning near‐field optical microscopy (s‐SNOM) on thin flakes of α‐MoO3, with analytical and transfer‐matrix calculations, as well as full‐wave simulations. Through these correlative efforts, exceptional quantitative agreement is attained to both far‐ and near‐field properties for multiple flakes, thus providing strong verification of the accuracy of this model, while offering a novel approach to extracting dielectric functions of nanomaterials. In addition, by employing density functional theory (DFT), insights into the various vibrational states dictating the dielectric function model and the intriguing optical properties of α‐MoO3 are provided.
Publisher version (URL)https://doi.org/10.1002/adma.201908176
URIhttp://hdl.handle.net/10261/218392
DOI10.1002/adma.201908176
ISSN0935-9648
E-ISSN1521-4095
Appears in Collections:(CINN) Artículos
(CFM) Artículos

Files in This Item:
File Description SizeFormat
infrarstud.pdf2,14 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work

WEB OF SCIENCETM
Citations

20
checked on Nov 23, 2021

Google ScholarTM

Check

Altmetric

Dimensions


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.