Electron transport through site-controlled single quantum dots/rings and its applications
Project/Area Number |
25246004
|
Research Category |
Grant-in-Aid for Scientific Research (A)
|
Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Nanostructural physics
|
Research Institution | The University of Tokyo |
Principal Investigator |
|
Co-Investigator(Renkei-kenkyūsha) |
SHIBATA Kenji 東北工業大学, 工学部, 准教授 (00436578)
OIWA Akira 大阪大学, 産業科学研究所, 教授 (10321902)
YOH Kanji 北海道大学, 量子集積エレクトロニクス研究センター, 教授 (60220539)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥45,890,000 (Direct Cost: ¥35,300,000、Indirect Cost: ¥10,590,000)
Fiscal Year 2015: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2014: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2013: ¥21,060,000 (Direct Cost: ¥16,200,000、Indirect Cost: ¥4,860,000)
|
Keywords | 量子ドット / テラヘルツ / 単一電子トランジスタ / ナノ構造 / 量子ナノ構造 / 量子準位 / 帯電エネルギー / テラヘルツ電磁波 |
Outline of Final Research Achievements |
The orbital quantization energies and electron energies in self-assembled InAs quantum dots lie in the energy range of terahertz photons. However, since the quantum dots are by far smaller than the terahertz wavelength, the conventional terahertz transmission spectroscopy cannot obtain signals from the quantum dots. In this work, we have developed a novel spectroscopy technique for single quantum dots; we have tightly focused terahertz radiation on a single quantum dot by using the source/drain electrodes of the single quantum dot transistor structure as a terahertz antenna and measured terahertz-induced photocurrent through the quantum dot. From such measurements, we have determined important parameters on the electronic structures of the quantum dots, such as orbital quantization energies and electron charging energies.
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Report
(4 results)
Research Products
(85 results)