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Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene

[Image: see text] Here we directly probe the electronic properties of bilayer graphene using s-SNOM measurements with a broadly tunable laser source over the energy range from 0.3 to 0.54 eV. We tune an OPO/OPA system around the interband resonance of Bernal stacked bilayer graphene (BLG) and extrac...

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Autores principales: Wirth, Konstantin G., Linnenbank, Heiko, Steinle, Tobias, Banszerus, Luca, Icking, Eike, Stampfer, Christoph, Giessen, Harald, Taubner, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7976599/
https://www.ncbi.nlm.nih.gov/pubmed/33763503
http://dx.doi.org/10.1021/acsphotonics.0c01442
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author Wirth, Konstantin G.
Linnenbank, Heiko
Steinle, Tobias
Banszerus, Luca
Icking, Eike
Stampfer, Christoph
Giessen, Harald
Taubner, Thomas
author_facet Wirth, Konstantin G.
Linnenbank, Heiko
Steinle, Tobias
Banszerus, Luca
Icking, Eike
Stampfer, Christoph
Giessen, Harald
Taubner, Thomas
author_sort Wirth, Konstantin G.
collection PubMed
description [Image: see text] Here we directly probe the electronic properties of bilayer graphene using s-SNOM measurements with a broadly tunable laser source over the energy range from 0.3 to 0.54 eV. We tune an OPO/OPA system around the interband resonance of Bernal stacked bilayer graphene (BLG) and extract amplitude and phase of the scattered light. This enables us to retrieve and reconstruct the complex optical conductivity resonance in BLG around 0.39 eV with nanoscale resolution. Our technique opens the door toward nanoscopic noncontact measurements of the electronic properties in complex hybrid 2D and van der Waals material systems, where scanning tunneling spectroscopy cannot access the decisive layers.
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spelling pubmed-79765992021-03-22 Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene Wirth, Konstantin G. Linnenbank, Heiko Steinle, Tobias Banszerus, Luca Icking, Eike Stampfer, Christoph Giessen, Harald Taubner, Thomas ACS Photonics [Image: see text] Here we directly probe the electronic properties of bilayer graphene using s-SNOM measurements with a broadly tunable laser source over the energy range from 0.3 to 0.54 eV. We tune an OPO/OPA system around the interband resonance of Bernal stacked bilayer graphene (BLG) and extract amplitude and phase of the scattered light. This enables us to retrieve and reconstruct the complex optical conductivity resonance in BLG around 0.39 eV with nanoscale resolution. Our technique opens the door toward nanoscopic noncontact measurements of the electronic properties in complex hybrid 2D and van der Waals material systems, where scanning tunneling spectroscopy cannot access the decisive layers. American Chemical Society 2021-01-28 2021-02-17 /pmc/articles/PMC7976599/ /pubmed/33763503 http://dx.doi.org/10.1021/acsphotonics.0c01442 Text en © 2021 American Chemical Society This is an open access article published under an ACS AuthorChoice License (https://creativecommons.org/licenses/by-nc-nd/4.0/) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Wirth, Konstantin G.
Linnenbank, Heiko
Steinle, Tobias
Banszerus, Luca
Icking, Eike
Stampfer, Christoph
Giessen, Harald
Taubner, Thomas
Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene
title Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene
title_full Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene
title_fullStr Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene
title_full_unstemmed Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene
title_short Tunable s-SNOM for Nanoscale Infrared Optical Measurement of Electronic Properties of Bilayer Graphene
title_sort tunable s-snom for nanoscale infrared optical measurement of electronic properties of bilayer graphene
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7976599/
https://www.ncbi.nlm.nih.gov/pubmed/33763503
http://dx.doi.org/10.1021/acsphotonics.0c01442
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