Control of single charge/and spin states using terahertz wave

2017 Fiscal Year Final Research Report

• Project/Area Number: 26706002
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Nanostructural physics
• Research Institution: Tohoku Institute of Technology
• Principal Investigator: Shibata Kenji 東北工業大学, 工学部, 准教授 (00436578)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: テラヘルツ / 量子ドット / トランジスタ

Outline of Final Research Achievements

Electrical manipulation and read-out of quantum states in zero-dimensional quantum dots by nanogap metal electrodes is expected to bring about innovation in quantum information processing. In this study, we established a method for performing terahertz spectroscopy on single 10nm scale quantum dots by using nanogap metal electrodes. Inter-sublevel transition spectra of single quantum dots are successfully measures for the first time and the electron-electron interaction are discussed for a single quantum dot. We also succeeded in demonstrating the THz spectroscopy for single molecular transistors. These works are opening a way for novel quantum information applications on self-assembled QD systems.

Free Research Field

ナノエレクトロニクス