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dc.contributor.authorYanagi, Kazuhiro
Okada, Ryotaro
Ichinose, Yota
Yomogida, Yohei
Katsutani, Fumiya
Gao, Weilu
Kono, Junichiro
dc.date.accessioned 2018-07-16T18:43:46Z
dc.date.available 2018-07-16T18:43:46Z
dc.date.issued 2018
dc.identifier.citation Yanagi, Kazuhiro, Okada, Ryotaro, Ichinose, Yota, et al.. "Intersubband plasmons in the quantum limit in gated and aligned carbon nanotubes." Nature Communicationsvolume, 9, (2018) Springer Nature: https://doi.org/10.1038/s41467-018-03381-y.
dc.identifier.urihttps://hdl.handle.net/1911/102432
dc.description.abstract Confined electrons collectively oscillate in response to light, resulting in a plasmon resonance whose frequency is determined by the electron density and the size and shape of the confinement structure. Plasmons in metallic particles typically occur in the classical regime where the characteristic quantum level spacing is negligibly small compared to the plasma frequency. In doped semiconductor quantum wells, quantum plasmon excitations can be observed, where the quantization energy exceeds the plasma frequency. Such intersubband plasmons occur in the mid- and far-infrared ranges and exhibit a variety of dynamic many-body effects. Here, we report the observation of intersubband plasmons in carbon nanotubes, where both the quantization and plasma frequencies are larger than those of typical quantum wells by three orders of magnitude. As a result, we observed a pronounced absorption peak in the near-infrared. Specifically, we observed the near-infrared plasmon peak in gated films of aligned single-wall carbon nanotubes only for probe light polarized perpendicular to the nanotube axis and only when carriers are present either in the conduction or valence band. Both the intensity and frequency of the peak were found to increase with the carrier density, consistent with the plasmonic nature of the resonance. Our observation of gate-controlled quantum plasmons in aligned carbon nanotubes will not only pave the way for the development of carbon-based near-infrared optoelectronic devices but also allow us to study the collective dynamic response of interacting electrons in one dimension.
dc.language.iso eng
dc.publisher Springer Nature
dc.rights This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.title Intersubband plasmons in the quantum limit in gated and aligned carbon nanotubes
dc.type Journal article
dc.citation.journalTitle Nature Communicationsvolume
dc.citation.volumeNumber 9
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1038/s41467-018-03381-y
dc.identifier.pmcid PMC5856781
dc.identifier.pmid 29549341
dc.type.publication publisher version
dc.citation.articleNumber 1121


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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
Except where otherwise noted, this item's license is described as This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.