Metallic Carbon Nanotube Nanocavities as Ultracompact and Low- loss Fabry-Perot Plasmonic Resonators

被引：18

作者：

Wang, Sheng ^{[1
,2
]}

Wu, Fanqi ^{[5
]}

Watanabe, Kenji ^{[6
]}

Taniguchi, Takashi ^{[6
]}

Zhou, Chongwu ^{[5
,7
]}

Wang, Feng ^{[1
,2
,3
,4
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Kavli Energy NanoSci Inst, Berkeley, CA 94720 USA

[4] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[5] Univ Southern Calif, Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA

[6] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[7] Univ Southern Calif, Dept Elect Engn, Los Angeles, CA 90089 USA

来源：

NANO LETTERS | 2020年 / 20卷 / 04期

基金：

美国国家科学基金会;

关键词：

Plasmonic nanocavity; Carbon nanotubes; Infrared nanoimaging; Nanophotonics;

D O I：

10.1021/acs.nanolett.0c00315

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Plasmonic resonators enable deep subwavelength manipulation of light matter interactions and have been intensively studied both in fundamental physics as well as for potential technological applications. While various metallic nanostructures have been proposed as plasmonic resonators, their performances are rather limited at mid- and far-infrared wavelengths. Recently, highly confined and low-loss Luttinger liquid plasmons in metallic single-walled carbon nanotubes (SWNTs) have been observed at infrared wavelengths. Here, we tailor metallic SWNTs into ultraclean nanocavities by advanced scanning probe lithography and investigate plasmon modes in these individual nanocavities by infrared nanoimaging. The dependence of mode evolutions on cavity length and excitation wavelength can be captured by a Fabry-Perot resonator model of a plasmon nanowaveguide terminated by highly reflective ends. Plasmonic resonators based on SWNT nanocavities approach the ultimate plasmon confinement limit and open the door to the strong light-matter coupling regime, which may enable various nanophotonic applications.

引用

页码：2695 / 2702

页数：8

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