Manipulation of spin-optoelectronics under light-matter strong coupling state

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K14605
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 32020:Functional solid state chemistry-related
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: OKADA DAICHI 国立研究開発法人理化学研究所, 創発物性科学研究センター, 特別研究員 (10880346)
• Project Period (FY): 2021-04-01 – 2023-03-31
• Keywords: 光-物質強結合状態 / 磁気円二色性 / キラル非線形光学効果 / ポラリトン / 光共振器

Outline of Final Research Achievements

In this study, we investigated the influence of light-matter strong coupling on spin-related physical properties of layered perovskite semiconductors , and explored how it contributes to the improvement of material characteristics. Here, the main focus of this research was the evaluation of magnetic circular dichroism and chiral nonlinear optical response. As a result, we found that the light-matter strong coupling state leads to an enhanced excitonic Zeeman splitting of layered perovskite, resulting in a significant enhancement of the magneto-circular dichroism signal. Furthermore, we revealed that it is possible to greatly modulate the dissymmetric response of second harmonic generation with respect to the polarization of the circularly polarized excitation.

Free Research Field

光工学

Academic Significance and Societal Importance of the Research Achievements

通常、物性の制御・特性向上は、物質デザインの最適化や電場や磁場などの外場印加によって行われる。しかし、本研究では、物質の組成を変えることなく、また特別な外場を必要とせず、2枚のミラーで物質を挟むだけという、非常に簡便な手法で、スピン関連物性を制御し、特性を向上させることができることを証明した。光と物質の強結合状態は、新しい量子的な物質修飾技術であり、今後さらに多くの物性の改善に活用されることが期待できる。