Metasurface-Coated Liquid Microlens for Super Resolution Imaging
Inspired by metasurfaces’ control over light fields, this study created a liquid microlens coated with a layer of Au@TiO<sub>2</sub>, Core-Shell nanospheres. Utilizing the surface plasmon resonance (SPR) effect of Au@TiO<sub>2</sub>, Core-Shell nanospheres, and the formation...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/16/1/25 |
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| author | Tongkai Gu Kang Wang Anjiang Cai Fan Wu Yasheng Chang Haiyan Zhao Lanlan Wang |
| author_facet | Tongkai Gu Kang Wang Anjiang Cai Fan Wu Yasheng Chang Haiyan Zhao Lanlan Wang |
| author_sort | Tongkai Gu |
| collection | DOAJ |
| description | Inspired by metasurfaces’ control over light fields, this study created a liquid microlens coated with a layer of Au@TiO<sub>2</sub>, Core-Shell nanospheres. Utilizing the surface plasmon resonance (SPR) effect of Au@TiO<sub>2</sub>, Core-Shell nanospheres, and the formation of photonic nanojets (PNJs), this study aimed to extend the imaging system’s cutoff frequency, improve microlens focusing, enhance the capture capability of evanescent waves, and utilize nanospheres to improve the conversion of evanescent waves into propagating waves, thus boosting the liquid microlens’s super-resolution capabilities. The finite difference time domain (FDTD) method analyzed the impact of parameters including nanosphere size, microlens sample contact width, and droplet’s initial contact angle on super-resolution imaging. The results indicate that the full width at half maximum (FWHM) of the field distribution produced by the uncoated microlens is 1.083 times that of the field distribution produced by the Au@TiO<sub>2</sub>, Core-Shell nanospheres coated microlens. As the nanosphere radius, droplet contact angle, and droplet base diameter increased, the microlens’s light intensity correspondingly increased. These findings confirm that metasurface coating enhances the super-resolution capabilities of the microlens. |
| format | Article |
| id | doaj-art-b32ac13399b24da4a6dd929ee63ecdc6 |
| institution | Kabale University |
| issn | 2072-666X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj-art-b32ac13399b24da4a6dd929ee63ecdc62025-01-24T13:41:52ZengMDPI AGMicromachines2072-666X2024-12-011612510.3390/mi16010025Metasurface-Coated Liquid Microlens for Super Resolution ImagingTongkai Gu0Kang Wang1Anjiang Cai2Fan Wu3Yasheng Chang4Haiyan Zhao5Lanlan Wang6School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaSchool of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710699, ChinaSchool of Optical and Electronic Information, Suzhou City University, Suzhou 215104, ChinaSchool of Architecture and Design, Kunshan Dengyun College of Science and Technology, Suzhou 215300, ChinaState Key Laboratory for Manufacturing System Engineering, Xi’an Jiaotong University, Xi’an 710054, ChinaInspired by metasurfaces’ control over light fields, this study created a liquid microlens coated with a layer of Au@TiO<sub>2</sub>, Core-Shell nanospheres. Utilizing the surface plasmon resonance (SPR) effect of Au@TiO<sub>2</sub>, Core-Shell nanospheres, and the formation of photonic nanojets (PNJs), this study aimed to extend the imaging system’s cutoff frequency, improve microlens focusing, enhance the capture capability of evanescent waves, and utilize nanospheres to improve the conversion of evanescent waves into propagating waves, thus boosting the liquid microlens’s super-resolution capabilities. The finite difference time domain (FDTD) method analyzed the impact of parameters including nanosphere size, microlens sample contact width, and droplet’s initial contact angle on super-resolution imaging. The results indicate that the full width at half maximum (FWHM) of the field distribution produced by the uncoated microlens is 1.083 times that of the field distribution produced by the Au@TiO<sub>2</sub>, Core-Shell nanospheres coated microlens. As the nanosphere radius, droplet contact angle, and droplet base diameter increased, the microlens’s light intensity correspondingly increased. These findings confirm that metasurface coating enhances the super-resolution capabilities of the microlens.https://www.mdpi.com/2072-666X/16/1/25liquid microlenssuper resolutionmetasurfaceSPRPNJs |
| spellingShingle | Tongkai Gu Kang Wang Anjiang Cai Fan Wu Yasheng Chang Haiyan Zhao Lanlan Wang Metasurface-Coated Liquid Microlens for Super Resolution Imaging Micromachines liquid microlens super resolution metasurface SPR PNJs |
| title | Metasurface-Coated Liquid Microlens for Super Resolution Imaging |
| title_full | Metasurface-Coated Liquid Microlens for Super Resolution Imaging |
| title_fullStr | Metasurface-Coated Liquid Microlens for Super Resolution Imaging |
| title_full_unstemmed | Metasurface-Coated Liquid Microlens for Super Resolution Imaging |
| title_short | Metasurface-Coated Liquid Microlens for Super Resolution Imaging |
| title_sort | metasurface coated liquid microlens for super resolution imaging |
| topic | liquid microlens super resolution metasurface SPR PNJs |
| url | https://www.mdpi.com/2072-666X/16/1/25 |
| work_keys_str_mv | AT tongkaigu metasurfacecoatedliquidmicrolensforsuperresolutionimaging AT kangwang metasurfacecoatedliquidmicrolensforsuperresolutionimaging AT anjiangcai metasurfacecoatedliquidmicrolensforsuperresolutionimaging AT fanwu metasurfacecoatedliquidmicrolensforsuperresolutionimaging AT yashengchang metasurfacecoatedliquidmicrolensforsuperresolutionimaging AT haiyanzhao metasurfacecoatedliquidmicrolensforsuperresolutionimaging AT lanlanwang metasurfacecoatedliquidmicrolensforsuperresolutionimaging |