Improving Luttinger-liquid plasmons in carbon nanotubes by chemical doping.
Nanoscale
; 10(14): 6288-6293, 2018 Apr 05.
Article
en En
| MEDLINE
| ID: mdl-29577139
ABSTRACT
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 mechanism is 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 plasmons is critical to the future application of plasmonic devices.
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Colección:
01-internacional
Banco de datos:
MEDLINE
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En
Revista:
Nanoscale
Año:
2018
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Article