Optical super-resonances in dielectric microsphere particles

Zengbo, W.; Boris, L.; Baidong, W.; Bing, Y.; Ahmetova, A.; Igor, Y.; Haibo, Y.; Lianqing, L.

Авторы: Zengbo Wang, Boris Luk'yanchuk, Baidong Wu, Bing Yan, Ahmetova Assel, Igor Yaminsky, Haibo Yu, Lianqing Liu
Журнал: Proceedings of SPIE - The International Society for Optical Engineering
Том: 1215205
Год издания: 2022
Издательство: SPIE, the International Society for Optical Engineering
Местоположение издательства: Bellingham, WA, United States
DOI: 10.1117/12.2621072
Аннотация: Extreme field localization and giant field enhancement are often achieved by using plasmonic nanostructures and metamaterials such as strongly coupled silver nanoparticles. Dielectric particles and structures can focus light beyond the diffraction limit (photonic nanojet effect), but with much weaker strengths. Recently, we showed that dielectric microspheres could support high-order Mie resonance modes ('super-resonance modes'), that can generate similar level of electric field intensity enhancement as plasmonic structures on the order of 104-107. In this work, we aim to further advance our understanding of the super-resonance modes. New results on the effects of size parameter and refractive index on optical super-resonances across a wide parameter range and with improved numerical accuracies is presented. The results suggest that the electric field intensity enhancement could reach a record high level of 109-1011 at specific conditions that surpass plasmonic enhancements. Moreover, super-resonance-enabled focusing by microsphere lens under different lighting sources (e.g., different color LEDs or lasers, halogen lamps) is investigated and compared for the first time. These results are important in understanding the super-resolution mechanism for microsphere nanoscopy and will find numerous potential applications in photonics.
Добавил в систему: Яминский Игорь Владимирович

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Optical super-resonances in dielectric microsphere particlesстатья

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