Near-field spectral properties and ultrafast dynamics of plasmon and molecular J-aggregates in the strong coupling regimes

Hiroki Takeuchi; Keisuke Imaeda; Sou Ryuzaki; Kosei Ueno

doi:10.1117/12.3027983

4 October 2024 Near-field spectral properties and ultrafast dynamics of plasmon and molecular J-aggregates in the strong coupling regimes

Hiroki Takeuchi, Keisuke Imaeda, Sou Ryuzaki, Kosei Ueno

Author Affiliations +

Proceedings Volume 13117, Enhanced Spectroscopies and Nanoimaging 2024; 131170Z (2024) https://doi.org/10.1117/12.3027983
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

We have been studying the spectral properties of strong coupling states between metallic nanostructures and excitons. We have reported on the modulation and dynamics of the near-field spectral properties of exciton-plasmon strong coupling systems. However, it has been difficult to quantitatively evaluate the phase relaxation times experimentally because the central wavelength of the exciton is far from the central wavelength of the Ti:sapphire laser. Therefore, in this study, we fabricated an exciton-plasmon strong coupling system using an exciton with a central wavelength near 800 nm and aimed to quantitatively clarify the relationship between the near-field spectral characteristics and the phase relaxation dynamics of the system. Peak splitting was observed both in the far-field and near-field spectra, indicating the successful formation of a strong coupling state. We are now trying to measure the phase relaxation dynamics of the strong coupling system.

Conference Presentation

Citation Download Citation

Hiroki Takeuchi, Keisuke Imaeda, Sou Ryuzaki, and Kosei Ueno "Near-field spectral properties and ultrafast dynamics of plasmon and molecular J-aggregates in the strong coupling regimes", Proc. SPIE 13117, Enhanced Spectroscopies and Nanoimaging 2024, 131170Z (4 October 2024); https://doi.org/10.1117/12.3027983

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