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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

an der Waals materials as dielectric layers for tailoring the near-field photonic response of surface

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Author(s):
Grasseschi, D. [1, 2] ; Bahamon, D. A. [1] ; Maia, F. C. B. [3] ; Barcelos, I. D. [3] ; Freitas, R. O. [3] ; de Matos, C. J. S. [1]
Total Authors: 6
Affiliation:
[1] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, BR-01302907 Sao Paulo - Brazil
[2] Fed Univ Rio de Janeiro UFRJ, Chem Inst, Inorgan Chem Dept, BR-21941909 Rio De Janeiro - Brazil
[3] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Optics Express; v. 30, n. 1, p. 255-264, JAN 3 2022.
Web of Science Citations: 0
Abstract

Epsilon near-zero photonics and surface polariton nanophotonics have become major fields within optics, leading to unusual and enhanced light-matter interaction. Specific dielectric responses are required in both cases, which can be achieved, e.g., via operation near a material's electronic or phononic resonance. However, this condition restricts operation to a specific, narrow frequency range. It has been shown that using a thin dielectric layer can adjust the dielectric response of a surface and, therefore, the operating frequency for achieving specific photonic excitations. Here, we show that a surface's optical properties can be tuned via the deposition/transference of ultra-thin layered van der Waals (vdW) crystals, the thicknesses of which can easily be adjusted to provide the desired response. In particular, we experimentally and theoretically show that the surface phonon resonance of a silica surface can be tuned by similar to 50 cm(-1) through the simple deposition of nanometer-thick exfoliated flakes of black phosphorus. The surface properties were probed by infrared nanospectroscopy, and results show a close agreement with the theory. The black phosphorus-silica layered structure effectively acts as a surface with a tunable effective dielectric constant that presents an infrared response dependent on the black phosphorus thickness. In contrast, with a lower dielectric constant, hexagonal boron nitride does not significantly tune the silica surface phonon polariton. Our approach also applies to epsilon near-zero surfaces, as theoretically shown, and to polaritonic surfaces operating at other optical ranges. (c) 2021 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement (AU)

FAPESP's process: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration
Grantee:Antonio Helio de Castro Neto
Support type: Research Projects - SPEC Program
FAPESP's process: 18/25339-4 - Integrated photonics devices
Grantee:Newton Cesario Frateschi
Support type: Research Projects - Thematic Grants
FAPESP's process: 19/14017-9 - From excitons waves to THz-phonons: 2Ds materials nano-optics via synchrotron infrared nanospectroscopy
Grantee:Raul de Oliveira Freitas
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 15/10405-3 - Synthesis, characterization, functionalization and ordering of metallic nanostructures
Grantee:Daniel Grasseschi
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/11779-4 - Plasmonic and nonlinear effects in graphene coupled to optical waveguides
Grantee:Christiano José Santiago de Matos
Support type: Research Projects - Thematic Grants