Photonic jet with tunable focus based on water droplets freezing from the outside in

Oleg V. Minin; Song Zhou; Igor V. Minin; Renxian Li; Yuexiao Jiao; Li Xiao; Zhuoyuan Shi; Yuan Zhang; Zhe Wang; Ruiping Yang; Huan Tang

doi:10.1117/12.3036295

20 November 2024 Photonic jet with tunable focus based on water droplets freezing from the outside in

Oleg V. Minin, Song Zhou, Igor V. Minin, Renxian Li, Yuexiao Jiao, Li Xiao, Zhuoyuan Shi, Yuan Zhang, Zhe Wang, Ruiping Yang, Huan Tang

Author Affiliations +

Proceedings Volume 13244, Nano-optoelectronics and Micro/Nano-photonics X; 132440Q (2024) https://doi.org/10.1117/12.3036295
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

Water droplets are a highly abundant phase-change material to realize tunable optical lenses. We demonstrated for the first time that freezing mesoscale water droplets could be used as a tunable optical lens, such that freezing becomes an asset despite the low absolute values of the refractive indices of the shell and core materials and their optical contrast. It is shown that the dielectric shell of mesoscale water droplets in solid ice allows controlling both the maximum field intensity and the focus position of the formed photonic nanojet. The ice formation with air bubbles during the freezing of a water droplet is appropriate for a dynamic increase in the range of change of the focal position compared to solid ice. The proposed concept of a tunable spherical lens based on a freezing water drop can be used for microscopy and optical trapping in "green" mesotronics.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Oleg V. Minin, Song Zhou, Igor V. Minin, Renxian Li, Yuexiao Jiao, Li Xiao, Zhuoyuan Shi, Yuan Zhang, Zhe Wang, Ruiping Yang, and Huan Tang "Photonic jet with tunable focus based on water droplets freezing from the outside in", Proc. SPIE 13244, Nano-optoelectronics and Micro/Nano-photonics X, 132440Q (20 November 2024); https://doi.org/10.1117/12.3036295

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