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Improving Luttinger-liquid plasmons in carbon nanotubes by chemical doping


We realized the real-space imaging of Luttinger-liquid plasmons in semiconducting single-walled carbon nanotubes (s-SWCNTs) and studied the effects of chemical-doping-induced charge carrier density modulation on plasmons.Using scattering-type scanning near-field optical microscopy (s-SNOM), we compared the Luttinger-liquid plasmonic behavior in pre- and post-HNO3-doped SWCNTs. Raman measurements revealed that the physical mechanismis P-type doping. Through HNO3 doping, we effectively increased the charge carrier density in s-SWCNTs and achieved quantum plasmons simultaneously with strong confinement(λ0⁄λp ≈ 70) and high quality factor(Q ≈ 20).The combination of high quality factor and strong subwavelength confinement in Luttinger-liquid plasmonsis critical to the future application of plasmonic devices.

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Publication details

The article was received on 12 Jan 2018, accepted on 06 Mar 2018 and first published on 07 Mar 2018

Article type: Communication
DOI: 10.1039/C8NR00310F
Citation: Nanoscale, 2018, Accepted Manuscript
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    Improving Luttinger-liquid plasmons in carbon nanotubes by chemical doping

    X. Tian, Q. Gu, J. Duan, R. Chen, H. Liu, Y. Hou and J. Chen, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR00310F

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