Improving Luttinger-liquid plasmons in carbon nanotubes by chemical doping. Issue 14 (26th March 2018)

• Record Type: Journal Article
• Authors: Tian, Xiaoling; Gu, Qingyuan; Duan, Jiahua; Chen, Runkun; Liu, Huaping; Hou, Yanxue; Chen, Jianing
• Is Part Of: Nanoscale. Volume 10:Issue 14(2018)
• Page Start: 6288
• Page End: 6293
• Publication Date: 2018-03-26
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c8nr00310f
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : We increased the charge carrier density in semiconducting single-walled carbon nanotubes (s-SWCNTs) by HNO3 doping and achieved real-space imaging of plasmons in s-SWCNTs. 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 ( λ 0 / λ p ≈ 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.