Terahertz Spectroscopy of Individual Carbon Nanotube Quantum Dots

被引：9

作者：

Tsurugaya, Takuma ^{[1
]}

Yoshida, Kenji ^{[1
]}

Yajima, Fumiaki ^{[2
,3
]}

Shimizu, Maid ^{[2
,3
]}

Homma, Yoshikazu ^{[2
,3
]}

Hirakawa, Kazuhiko ^{[1
,4
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, 4-6-1 Komaba, Tokyo 1538505, Japan

[2] Tokyo Univ Sci, Dept Phys, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan

[3] Tokyo Univ Sci, Res Inst Sci & Technol, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan

[4] Univ Tokyo, Inst Nano Quantum Informat Elect, Meguro Ku, 4-6-1 Komaba, Tokyo 1538505, Japan

来源：

NANO LETTERS | 2019年 / 19卷 / 01期

关键词：

Carbon nanotubes; Terahertz spectroscopy; quantum dots; single-electron transistors; intersublevel transition; TRANSPORT; PLASMON;

D O I：

10.1021/acs.nanolett.8b03801

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have investigated the electronic structures of metallic carbon nanotube quantum dots (CNT QDs) by terahertz-induced photocurrent spectroscopy. Sharp peaks due to intersublevel transitions in the CNT QDs are observed at the sublevel energy spacings expected from the linear band dispersion. The line width of the photocurrent peak is as narrow as 0.3 meV and is governed by the tunnel coupling with the electrodes, indicating that the scattering time of electrons in the present CNTs is comparable to or longer than 10 ps. The observation of a sharp absorption peak at the bare quantization energy was not consistent with the Tomonaga-Luttinger liquid theory.

引用

页码：242 / 246

页数：5

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