Revisiting the Plasmon Radiation Damping of Gold Nanorods

Noble metal nanoparticles have been utilized for a vast amount of optical applications. For the applications that used metal nanoparticles as nanosensors and optical labeling, larger radiation damping is preferred (higher optical signal). To get a deeper knowledge about the radiation damping of nobl...

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Bibliographic Details
Published inarXiv.org
Main Authors Yang, Yanhe, Ni, Weihai, Xie, Hao, You, Jian, Ye, Weixiang
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 31.05.2021
Subjects
Aspect ratio
Damping
Gold
Nanoparticles
Nanorods
Noble metals
Optical communication
Physics - Optics
Radiation
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Summary:Noble metal nanoparticles have been utilized for a vast amount of optical applications. For the applications that used metal nanoparticles as nanosensors and optical labeling, larger radiation damping is preferred (higher optical signal). To get a deeper knowledge about the radiation damping of noble metal nanoparticles, we used gold nanorods with different geometry factors (aspect ratios) as the model system to study. We investigated theoretically how the radiation damping of a nanorod depends on the material, and shape of the particle. Surprisingly, a simple analytical equation describes radiation damping very accurately and allow to disentangle the maximal radiation damping parameter for gold nanorod with resonance energy E_res around 1.81 eV (685 nm). We found very good agreement with theoretical predictions and experimental data obtained by single-particle spectroscopy. Our results and approaches may pave the way for designing and optimizing gold nanostructure with higher optical signal and better sensing performance.
ISSN:2331-8422
DOI:10.48550/arxiv.2105.14873