Multiply-extreme nano-photonics developed by first-principles calculation

2023 Fiscal Year Final Research Report

• Project/Area Number: 20H02649
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 30020:Optical engineering and photon science-related
• Research Institution: University of Tsukuba
• Principal Investigator: Yabana Kazuhiro 筑波大学, 計算科学研究センター, 教授 (70192789)
• Co-Investigator(Kenkyū-buntansha): 植本 光治 神戸大学, 工学研究科, 助教 (90748500)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 非線形光応答 / ナノフォトニクス / 第一原理計算 / 高強度超短パルスレーザー / アト秒科学 / 高次高調波発生 / プラズモニクス

Outline of Final Research Achievements

For nonlinear optical responses and ultrafast electron dynamics caused by the interaction of intense ultrashort pulsed light with nano-sized materials, we have developed a computational method that combines real-time calculations of electron dynamics based on first principles method in materials science with electromagnetic field analysis method that describes light propagation. Using this method, we have elucidated the nonlinear interactions that occur in the interaction of pulsed light with thin films and nanostructures, particularly the generation of higher harmonics and their nonlinear light propagation. In addition, quantum effects and nonlinear optical responses appearing in the plasmons of metallic nanoparticles were investigated.

Free Research Field

計算光物質科学

Academic Significance and Societal Importance of the Research Achievements

本研究で発展させた理論と計算手法は、原子スケールから経験的パラメータを用いることなく非線形光応答と超高速電子ダイナミクスを調べることを可能とし、基礎と応用の両面で急速に発展する高強度超短パルスレーザーを用いた研究の発展に重要な役割を果たすものである。本研究で開発された計算コードはオープンソースソフトウェアSALMONに実装し、当該分野の研究コミュニティで自由に活用できるよう整備を進めている。