Terahertz imaging on the basis of one-dimensional plasmonics

2021 Fiscal Year Final Research Report

• Project/Area Number: 19H02536
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28010:Nanometer-scale chemistry-related
• Research Institution: Kyoto Institute of Technology (2020-2021); Nara Institute of Science and Technology (2019)
• Principal Investigator: Nonoguchi Yoshiyuki 京都工芸繊維大学, 材料化学系, 講師 (50610656)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: プラズモニクス / 熱電変換 / カーボンナノチューブ / 非破壊検査 / 赤外線 / テラヘルツ波

Outline of Final Research Achievements

Nondestructive chemical analysis by imaging using terahertz waves has been proposed, and there is a growing demand for the development of the basic technology. Although terahertz wave detection using carbon nanotubes (CNTs) has been proposed, the basic science has not been sufficiently developed. The purpose of this study is to realize a dramatic increase in sensitivity of CNT terahertz response by deepening the science of one-dimensional plasmonics. Specifically, we demonstrated that the one-dimensional plasmon resonance of semiconducting CNTs can be controlled by our originally developed molecular doping technique, and clarified the structural dependence of the photothermoelectric effect. Based on the academic foundation obtained here, we presented a thermoelectric device-type terahertz wave imaging technology that greatly surpasses existing performance.

Free Research Field

物性化学

Academic Significance and Societal Importance of the Research Achievements

一般にプラズモニクスはキャリア密度の関数で示されるが、ＣＮＴに関してはその基本的な関係性さえ報告されていなかった。これは複数分野に分散した研究手法が統合されていなかったことに起因する。ＣＮＴプラズモニクスの理解と制御に向けてはフォトニクス、物性、電子移動化学など横断領域の知見と技術が必要となる。本研究課題では、このような学術領域の包括的な理解とともに、超分子を用いたドーピング技術など独自性の高い研究手法を基盤とし、今世紀の科研費助成にふさわしい創造的かつ独創的な研究を展開した点で極めて意義深い。