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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.)

Probing Polaritons in 2D Materials with Synchrotron Infrared Nanospectroscopy

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Barcelos, Ingrid D. [1] ; Bechtel, Hans A. [2] ; de Matos, Christiano J. S. [3] ; Bahamon, Dario A. [3] ; Kaestner, Bernd [4] ; Maia, Francisco C. B. [1] ; Freitas, Raul O. [1]
Total Authors: 7
[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Synchrotron Light Lab LNLS, BR-13083970 Campinas, SP - Brazil
[2] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 - USA
[3] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, BR-01302907 Sao Paulo, SP - Brazil
[4] PTB, Abbestr 2-12, D-10587 Berlin - Germany
Total Affiliations: 4
Document type: Review article
Source: ADVANCED OPTICAL MATERIALS; v. 8, n. 5, SI DEC 2019.
Web of Science Citations: 1

Polaritons, which are quasiparticles composed of a photon coupled to an electric or magnetic dipole, are a major focus in nanophotonic research of van der Waals (vdW) crystals and their derived 2D materials. For the variety of existing vdW materials, polaritons can be active in a broad range of the electromagnetic spectrum (meVs to eVs) and exhibit momenta much higher than the corresponding free-space radiation. Hence, the use of high momentum broadband sources or probes is imperative to excite those quasiparticles and measure the frequency-momentum dispersion relations, which provide insights into polariton dynamics. Synchrotron infrared nanospectroscopy (SINS) is a technique that combines the nanoscale spatial resolution of scattering-type scanning near-field optical microscopy with ultrabroadband synchrotron infrared radiation, making it highly suitable to probe and characterize a variety of vdW polaritons. Here, the advances enabled by SINS on the study of key photonic attributes of far- and mid-infrared plasmon- and phonon-polaritons in vdW and 2D crystals are reviewed. In that context the SINS technique is comprehensively described and it is demonstrated how fundamental polaritonic properties are retrieved for a range of atomically thin systems including hBN, MoS2, graphene and 2D heterostructures. (AU)

FAPESP's process: 15/11779-4 - Plasmonic and nonlinear effects in graphene coupled to optical waveguides
Grantee:Christiano José Santiago de Matos
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration
Grantee:Antonio Helio de Castro Neto
Support Opportunities: Research Projects - SPEC Program
FAPESP's process: 18/07276-5 - Mid- and far-infrared plasmonic biosensing with graphene
Grantee:Christiano José Santiago de Matos
Support Opportunities: Regular Research Grants