Electrical manipulation of excitons in single-walled carbon nanotube devices

2015 Fiscal Year Final Research Report

• Project/Area Number: 24340066
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: The University of Tokyo
• Principal Investigator: KATO Yuichiro 東京大学, 工学(系)研究科(研究院), 准教授 (60451788)
• Co-Investigator(Kenkyū-buntansha): SHIMADA Takashi 東京大学, 大学院工学系研究科, 助教 (20466775)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: ナノチューブ・フラーレン / 光物性 / 物性実験 / 光伝導度 / フォトルミネッセンス / 電界効果トランジスター

Outline of Final Research Achievements

Microspectroscopy has been performed on chirality-identified suspended carbon nanotubes within field-effect devices, and response of excitons in electric fields has been investigated. Simultaneous photoluminescence and photoconductivity spectroscopy have revealed spontaneous exciton dissociation and field activation of dark excitonic states, and Stark effect has been directly compared with theory. Formation of trions has been observed under an application of gate voltages, while it was found that square-wave gate voltages can induce optical pulse trains. Light emitting diodes using split gates has also been investigated.

Free Research Field

光物性・ナノデバイス物理