Theory of fast energy transfer using qunatum nano structures and its applicaiton to quantum nano antenna

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04575
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21050:Electric and electronic materials-related
• Research Institution: Kitasato University
• Principal Investigator: Oka Hisaki 北里大学, 理学部, 教授 (00508806)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: エネルギー移動 / 量子コヒーレンス / ナノアンテナ

Outline of Final Research Achievements

Light-harvesting energy transfer is the process in which the photon absorbed by a donor is transferred to an acceptor, and is an important basical process in photosynthetic systems. In natural light-harvesting system (LH) of photosynthetic bacteria, it is well known that the LHs are arranged in the form of a circular structure and achieve an efficient energy transfer of absorbed light energy. In this project, we establish a theory to mimic efficient and rapid energy transfer realized in natural photosynthetic systems by utilizing the optical nano-devices We show that a rapid energy transfer can be achieved utilizing nano-devices without structural fluctuation, which is considered to be essential to natural photosynthetic system and prevent us from device application utilizing nano-structures.

Free Research Field

量子光学

Academic Significance and Societal Importance of the Research Achievements

従来の人工光合成のエネルギー移動研究は，分子置換や構造制御などがメインである．例えば人工光合成にみられる葉緑素（クロロフィル）を安価な人工ポルフィリンで置き換える研究がこれにあたる．これまでにも円環構造を模倣した研究は数多く存在するが，本研究成果にある「量子準位内における機能分担」に高速化の実現は，我々の知る限り無く，高い学術的意義を持つといえる．更に本研究成果は量子コヒーレンスや量子もつれを用いた様々な量子ネットワーク系，例えば，現在注目を集めている量子ニューロモーフィックなどへの波及効果も期待できる．このように応用の波及性の広さからも本研究は社会的意義が高いといえる．