Novel plasmonic optics using non-Hermitian photonics

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14551
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 30020:Optical engineering and photon science-related
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Moritake Yuto 東京工業大学, 理学院, 助教 (50783049)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ナノフォトニクス / プラズモニクス / フォトニック結晶 / 非エルミート系 / 相変化材料

Outline of Final Research Achievements

In this study, we proposed and demonstrated a novel optical device using a non-Hermite optical system. Using graphene-loaded photonic crystals, we demonstrated a chiral property of exceptional points. We also proposed that this chiral response can be used for high-sensitivity sensing. As a modulation technique for dynamic optical response, we developed experimental techniques about GST and applied it to nanophotonic structures to realize dynamic modulation of optical response. Furthermore, we proposed a switchable unidirectional radiation phenomenon using exceptional points. We proposed a method for generating optical orbital angular momentum with a localization phenomenon unique to non-Hermite systems.

Free Research Field

ナノフォトニクス

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した非エルミート性による光機能は、従来の光学素子の高機能化や、新しい光機能につながるものである。また、GSTによる光学応答の動的変調技術は、光回路等で必要な光スイッチなどのデバイス応用にむけた重要な要素技術である。これらにより、例えば、低消費エネルギーなデバイスや高感度な生化学センサ等の開発につながる。