On-chip manipulation of the coupling between a THz light source and a photon detector using quantum transport channels

2016 Fiscal Year Final Research Report

• Project/Area Number: 25287071
• 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: Tokyo University of Agriculture and Technology
• Principal Investigator: Ikushima Kenji 東京農工大学, 工学(系)研究科(研究院), 准教授 (20334302)
• Co-Investigator(Kenkyū-buntansha): 好田 誠 東北大学, 工学(系)研究科(研究院), 准教授 (00420000)
• Research Collaborator: KOBAYASHI Takashi ; VIDELIER Hadley ; ITO Atsushi ; OKANO Shun
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: メゾスコピック系・局在

Outline of Final Research Achievements

The purpose of this work is to realize the on-chip THz system in which the generation, transmission and detection are electrically driven in a single chip. The platform is in a two-dimensional electron system in strong magnetic field. Using a point-source from quantum Hall edge states and a quantum-dot single photon detector, the following results are obtained. (1) Single photon detection of THz waves propagating a coplanar waveguide (or resonating in a coplanar split ring) is demonstrated. (2) Using these on-chip THz systems, it is found that photon emission due to electrons injected by edge channels requires the spin-flip Landau-level transition, probably through the spin-orbit interaction due to edge drift motion. These results provide the feasibility of on-chip THz photon manipulation and imply the possible applications of photon manipulation due to spin-polarized quantum transport channels.

Free Research Field

物性物理学