2023 Fiscal Year Final Research Report
First-principles study of light-matter interactions on semiconducting metasurfaces
| Project/Area Number |
20K15194
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 30020:Optical engineering and photon science-related
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| Research Institution | Kobe University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | ナノフォトニクス / 非線形光学 / 第一原理計算 / 電子ダイナミクス / 半導体ナノ粒子 / 炭素材料 / フェムト秒レーザー |
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| Outline of Final Research Achievements |
In this research, I developed computational methods to predict perturbative and non-perturbative nonlinear optical effects induced by strong laser pulses in nanoscale thin films, nanoparticles, and their periodically arranged structures using first-principles electron dynamics calculations. I implemented a simulator based on a multiscale computational method that combines time-dependent density functional theory (TDDFT) for electron dynamics calculations with one- to three-dimensional time-domain finite-difference electromagnetic field analysis. Additionally, I developed a extension of the multiscale method employing semiconductor Bloch equations (SBEs) for electron systems to improve speed and scalability. Besides, I demonstrated the simulation of nonlinear responses from all-dielectric nanostructure and 2 dimensional materials.
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| Free Research Field |
フォトニクス
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| Academic Significance and Societal Importance of the Research Achievements |
ナノフォトニクス分野においてデバイス設計や特性予測に電磁界シミュレーションの存在は必要不可欠である。本研究で発展させた計算手法はナノ物質における従来直接的な取り扱いが困難であった非摂動論的非線形光学効果（高次高調波発生や可飽和吸収など）を考慮した電磁界シミュレーションを可能にする。さらに、開発されたツールをオープンソースの光科学シミュレータの一部として実装しWebで公開することで社会還元も行っている。
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